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Don't Know Which Mobile Phone to Buy: How to Choose a Smartphone (Want a long battery duration)

The aim of this guide is to help you decide which (smart-)phone is the best for you, based on your needs and budget.

Here are some basic points you should know when buying a smartphone: 

1) Operating system (OS) - The user interface which allows common users to use the hardware components (camera, speakers, etc.). The most common operating systems which run on smartphones are:

  • Android - runs on the majority of smartphones (Sony, Samsung, LG, Huawei, etc.). The latest version of this operating system is Android OS v.6 Marshmallow (as of Aug 2016). Some PROs and CONs using Android as operating system:

    PROs: 
    - A huge catalogue of applications
    - Home-screen widgets
    - Open-source

    CONs: 
    - Back-up options are limited to specific user data
    - No quality control of the applications
  • iOS - runs only on iPhones, iPads and iPods. Its latest version is iOS v.9.3 (as of Aug 2016)

    PROs:
    - Full back-up service
    - Frequent system updates
    - Greater control of notifications and data usage
    - Easier to uninstall applications
    - Mostly high-quality apps are offered in App store

    CONs:
    -     No home-screen widgets
    - Many limitations
     
  • Windows Phone OS - used by Nokia and Microsoft smartphones. The latest version of this smartphone is Windows Mobile 10 (as of Aug 2016)
  • BlackBerry OS - used only on Blackberry smartphones. The latest version of Blackberry OS is v10.3 (as of Aug 2016)

Note that not all devices can be upgraded to the latest OS version. It's mentioned in the solutions listed below. 

2) CPU (Central Processing Unit, or Processor, or the "brain" of a smartphone) - The main component of a smartphone which is a crucial factor for phone speed (how quickly applications open etc.).

There are several types of processors used in smartphones:

  • Single-Core - It has only one independent microprocessor
  • Dual-Core  - A multi-core processor with two independent microprocessors
  • Quad-Core  - A multi-core processor with four independent microprocessors
  • Hexa-Core - A multi-core processor with six independent microprocessors
  • Octa-Core - A multi-core processor with eight independent microprocessors

Note: You should treat the smartphone as a whole, as unity of all the components in it. It doesn't mean that a device which has an Octa-Core processor is faster than a device which has a Quad-Core processor. For instance, iPhone 6s has a Dual-Core processor, but it doesn't lag as much as some Octa-Core-processor smartphones.

The above-mentioned note also applies to camera quality. It doesn't mean that a 21 megapixel camera will produce higher-quality images than an 8 megapixel one (take iPhones for example. iPhone 6s has a 12 MP camera and produces better images than smartphones with 21 megapixel camera).

3) RAM (Random Access Memory) - The more RAM the more applications you can run in parallel.  Usually, the amount of RAM in smartphones varies from 1 GB to 4 GB.

4) Storage size - The space you have to store your pictures, music, videos or other documents. The amount of free memory on smartphones varies from 4 GB - 128 GB of internal memory, plus the ability to add a microSD card (up to 256 GB)

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Select specifications which apply:

Click on this if you're not willing to pay more than $100 on your mobile

Click on this if you only want to spend a max. of $200 on your mobile

Click on this if you only want to spend a max. of $300 on your mobile

Click on this if you only want to spend a max. of $500 on your mobile

Click on this if you don't want to spend more than $1,000 on your mobile

Click on this if you're willing to pay more than $1,000 on your mobile.

Click on this if you want a smartphone (with more functions than a calls-and-SMS-only phone)

Click on this if you only need the most basic functions in a phone: making calls and sending SMS

Click on this if you want your mobile to have a certain size (be it big or small)

Click on this if you already know from which manufacturer (Apple, LG, Windows etc.) your mobile should be.

Click on this if you want a (smart-)phone with a removable (which you can easily remove and replace yourself), or a non-removable (which can be removed and replaced in repair shops only) battery.

Click on this if you have a preferred operating system (e.g. iOS, Android, or Windows) which might be the case if you already use this operating system and don't want to switch to a different one.

Click on this if you want a mobile device with a secondary camera.

Click on this if you want to add extra memory (a microSD card) to your mobile device

Click on this if you want a device with a scratch−resistant screen, i.e. a device which has a "Corning Gorilla Glass" protection.

Click on this if you want your new mobile to have a stylish design

Click on this if long battery life is very important to you

Click on this if you want a battery which would last at least 70 hours if you do one hour of calls, one hour of video playback and one hour of web browsing daily.

Click on this if you want a battery which would last at least 100 hours if you do one hour of calls, one hour of video playback and one hour of web browsing daily.

Click on this if you want a battery which would last at least 50 hours, if you do one hour of calls, one hour of video playback and one hour of web browsing daily.

Click on this if you want a battery which would last at least 30 hours if you do one hour of calls, one hour of video playback and one hour of web browsing daily.

Click on this if you want to additionally protect your smartphone and unlock it only with your fingerprint.

Click on this if you want to buy a waterproof mobile device (i.e. a device which can be used under water for a certain period of time)

Click on this if it's important to you that your mobile device has a physical keyboard, i.e. not only a "virtual keyboard" on the screen

Click on this if you have specific technical requirements, e.g. processor speed, min. megapixels for camera etc.

Click on this if you want a phone running on the Android operating system.

Click on this if if want a mobile device which works with a nano SIM card (it looks like this http://goo.gl/0DOq4e)

Click on this if you want your mobile (camera) to have at least 4 Megapixels. Read this intro to megapixels http://goo.gl/dbNK9r, however be aware that a high number of megapixels doesn't guarantee a high picture quality, as you can read here: http://goo.gl/PUZ8QV

Click on this if you want a mobile device which works with a micro SIM card (it looks like this http://goo.gl/v8rUoz).

Click on this if you're fine if your new mobile has a camera with less than 4 Megapixels. Read this intro to megapixels http://goo.gl/dbNK9r, however be aware that a high number of megapixels doesn't guarantee a high picture quality, as you can read here: http://goo.gl/PUZ8QV

Click on this if want a mobile device which works with a standard/mini SIM card (it looks like this https://goo.gl/nrkomV)

Click on this if you want your mobile (camera) to have at least 6 Megapixels. Read this intro to megapixels http://goo.gl/dbNK9r, however be aware that a high number of megapixels doesn't guarantee a high picture quality, as you can read here: http://goo.gl/PUZ8QV

Click on this if you want a phone running on the Windows phone operating system.

Click on this if want the diagonal of your mobile screen to be larger than 5.3 inches. See on http://goo.gl/3jNErw how much that is.

Click on this if you want a phone running on the iOS operating system.

Click on this if want the diagonal of your mobile screen to be between 4.65 and less than 5.3 inches. See on http://goo.gl/3jNErw how much that is.

Click on this if you want your mobile (camera) to have at least 8 Megapixels. Read this intro to megapixels http://goo.gl/dbNK9r, however be aware that a high number of megapixels doesn't guarantee a high picture quality, as you can read here: http://goo.gl/PUZ8QV

Click on this if you want your mobile (camera) to have at least 12 Megapixels. Read this intro to megapixels http://goo.gl/dbNK9r, however be aware that a high number of megapixels doesn't guarantee a high picture quality, as you can read here: http://goo.gl/PUZ8QV

Click on this if you want the diagonal of your mobile screen to be between 3.5 and less than 4.3 inches. See on http://goo.gl/3jNErw how much that is.

Click on this if you're fine with a phone which only supports the second generation of wireless telephone technology

Click on this if you don't want the diagonal of your mobile screen exceed 3.5 inches. See on http://goo.gl/3jNErw how much that is.

Click on this if want the diagonal of your mobile screen to be between 4.3 and less than 4.65 inches. See on http://goo.gl/3jNErw how much that is.

Click on this if you want a phone that supports the third generation of wireless telephone technology

Click on this if you want a phone that supports the fourth generation of wireless telephone technology.

Click on this if it's important to you that the phone has a certain storage size so that you can save many pictures/music/video on your mobile

Click on this if you want your phone to have at least 8 gigabytes of storage space

Click on this if you want your phone to have at least 16 gigabytes of storage space

Click on this if you want your phone to have at least 32 gigabytes of storage space

Click on this if you want your phone to have at least 64 gigabytes of storage space

Click on this if you want a smartphone which has a Dual core, Quad core, Hexa Core or Octa core processor.

Solutions (31)
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  1. Buy HTC Desire 820 (from $318.98)

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    A mid-range phone model focused on making "selfies". Featuring excellent UI, fast CPU and a functional keyboard.

    One of its flaws is software problems.

    Its key features are:

    • Android OS, v4.4.2 (KitKat), upgradable to v6.0.1 (Marshmallow)
    • A Quad-core 1.5 GHz Cortex-A53 & quad-core 1.0 GHz Cortex-A53 processor
    • 2 GB RAM
    • 13 MP camera with autofocus and a 8 MP front camera
    • LCD capacitive touchscreen with 16M colors
    • Its 5.5-inch display is protected with Corning Gorilla Glass 3
    • Internal memory of 16 GB with the possibility to add a microSD card up to 256 GB
    • A non-removable 2600 mAh battery, which offers you 14:17 - 22:24 hours of talk time, 09:10 hours of web browsing and 07:10 hours of video playback and up to 424 hours of stand-by. (according to tests)

    Pros

    • Dual frontal stereo speakers
    • Large RAM (2 GB)
    • Large internal memory
    • 4G-LTE Support
    • Large screen size

    Cons

    • A bit too large to hold
    • Not good low-light camera pictures

     

    You can purchase the Dual SIM model of this smartphone, which is rated with 3.1/5 stars, from Amazon.

    ---
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  2. Buy Sony Xperia Z5 (from $354.99)

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    Current flagship model from Sony, Xperia Z5 features strong battery, great design and all-round performance. Its downside is the heating problem.

    Note: Only the EU model has a fingerprint sensor.

    Its key features are:

    • Android OS, v5.1.1 (Lollipop), upgradable to v6.0 (Marshmallow)
    • A Quad-core 1.5 GHz Cortex-A53 & Quad-core 2.0 GHz Cortex-A57 processor
    • 3 GB RAM
    • 23 MP camera with autofocus and a 5.1 MP front camera
    • An IPS LCD capacitive touchscreen with 16M colors
    • A 5.2-inch display protected with a scratch-resistant glass and oleophobic coating
    • Internal memory of 32 GB, with the possibility to add a microSD card up to 256 GB
    • A non-removable 2900 mAh battery, which offers you 17:13 hours of talk time, 14:35 hours of web browsing and 07:53 hours of video playback. (according to tests)

    Pros

    • Water-resistant
    • A 23 Megapixel camera with hybrid autofocus
    • Large RAM (3 GB)
    • 4G-LTE Support
    • Great quality 4K recording.

    Cons

    • Heating issue
    • Expensive

    You can buy this smartphone, which is rated with 4.1/5 stars, from Amazon.

    ---
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  3. Buy Huawei Ascend G7 (from $234.13)

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    Ascend G7 is a mid-range smartphone, featuring big screen, good specs and a very long battery life. However, screen resolution is only 720p.

    Its key features are:

    • Android OS, v4.4.2 (KitKat), with a planned upgrade to v6.0 (Marshmallow)
    • A Quad-core 1.2 GHz Cortex-A53 processor
    • 2 GB RAM
    • 13 MP camera with autofocus and a 5 MP front camera
    • IPS LCD capacitive touchscreen with 16M colors
    • A 5.5-inch display
    • Internal memory of 16 GB with the possibility to add a microSD card up to 32 GB
    • A non-removable 3000 mAh battery

    Pros

    • Excellent battery life
    • Nice metal body
    • Large screen

    Cons

    • Heavy (165 g)
    • A bit too large to hold
    • Average sound quality

    You can become the owner of this smartphone, which is rated with 4.6/5 stars by customers on Amazon.uk, if you follow this link.

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  4. Buy Huawei Mate 8 (from $422.01)

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    Mate 8 has a beautiful display, elegant design and a long battery life. Highly recommended for anybody who is looking for a classy phone.

    Its key features are:

    • Android OS, v6.0 (Marshmallow)
    • A Quad-core 2.3 GHz Cortex-A72 + quad-core 1.8 GHz Cortex A53 processor
    • 3/4 GB RAM (depends on the model)
    • Dual SIM (Nano SIM) support (depends on the model)
    • 16 MP camera with autofocus and a 8 MP front camera
    • IPS LCD capacitive touchscreen with 16M colors
    • Its 6-inch display is protected with Corning Gorilla Glass 4
    • Internal memory of 32/64 GB (depends on the model) with the possibility to add a microSD card up to 256 GB (which will use the SIM 2 slot)
    • A non-removable 4000 mAh battery, which offers you 26:45 hours of talk time, 17:05 hours of web browsing and 12:34 hours of video playback and up to 528 hours of stand-by. (according to tests)

    Pros

    • Dual SIM
    • Large RAM (3/4 GB)
    • Large internal memory
    • 4G-LTE Support
    • Large screen size
    • A 4000 mAh battery

    Cons

    • A bit too large to hold
    • SIM 2 slot shared with microSD card
    • Lacks 4K Video recording

    • You can become the owner of the 32 GB version, which is rated with 4.2/5 stars by customers on Amazon, if you follow this link.
    • If you want to purchase the 64 GB version, which is also rated with 4.1/5 stars, click here.

    ---
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  5. Buy Nokia Asha 300 (from $99.99)

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    Asha 300 is a 3G phone with a very strong and durable design, however even though it is mainly made as a budget phone, its price is somewhat too high.

    Its key features are:

    • A 1 GHz CPU
    • TFT display with 256K colors
    • A 2.4-inch display
    • A 5 MP camera
    • Internal memory of 140 MB, with the possibility to add a microSD card up to 32 GB
    • A removable 1110 mAh battery, which offers you 6 hours and 54 minutes of talk time and 550-597 hours of stand-by. (according to tests)

    Pros

    • Affordable price
    • Great sound quality
    • Easy-to-navigate user interface

    Cons

    • Fixed display brightness
    • Weak camera
    • No Wi-Fi

    You can buy this smartphone, which is rated with 3.8/5 stars, from Amazon.

    ---
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  6. Buy Nokia Lumia 830 (from $150.00)

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    Lumia 830 has a solid battery life, bright screen and a great camera. Very good all-round phone recommended for anybody who is looking to try Windows phone OS and have a very nice smartphone at the same time.

    Its key features are:

    • Microsoft Windows Phone 8.1
    • A Quad-core 1.2 GHz Cortex-A7 processor
    • 1 GB RAM
    • 10 MP camera with autofocus and a 0.9 MP front camera
    • IPS LCD capacitive touchscreen with 16M colors
    • Its 5-inch display is protected with Corning Gorilla Glass 3
    • Internal memory of 16 GB with the possibility to add a microSD card up to 256 GB
    • A removable 2200 mAh battery, which offers you 14:56 hours of talk time, 10:36 hours of web browsing and 09:58 hours of video playback and up to 528 hours of stand-by. (according to tests)

    Pros

    • Attractive, colourful design
    • Great photos in low light
    • Great screen
    • Stereo speakers

    Cons

    • Older Chipset (Qualcomm Snapdragon 400)
    • Weak front camera

    You can buy this smartphone, which is rated with 4.2/5 stars, from Amazon.

    ---
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  7. Buy Nokia 3310 (from $16.14)

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    Still considered to be "the best phone ever" by some, this mobile was extremely popular on the start of second millennium.

    Performing exceedingly well in the mobile phones primary functions (voice calls and SMS), Nokia 3310 became a legend in the mobile industry.

    Some of the Nokia 3310 highlights:

    • battery could last for up to 260 hours in standby mode or 4,5 hours in talking mode
    • it was extremely tough, screen and structure didn't break even after some serious impacts
    • there were a plenty of phone covers for it, making it look cool
    • everybody remembers those legendary games on 3310 - Snake and Space impact

     You can buy this legendary phone from eBay

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  8. Buy LG Magna ($134.97) − Currently unavailable

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    An average smartphone, featuring a big screen and Android 5.0 Lollipop and a good display.

    Very poor memory storage for its competitors and angular design which some users find rather unpleasant for handling is what makes the downside of this phone.

    Its key features are:

    • Android OS, v5.0.1 (Lollipop), upgradable to v6.0.1 (Marshmallow)
    • A Quad-core 1.2 GHz /
      Quad-core 1.3 GHz Cortex-A7 - H502 model processor (depends on the model)
    • Dual SIM support (Micro-SIM)
    • 1 GB RAM
    • 8 MP camera with autofocus and a 5 MP front camera
    • IPS LCD capacitive touchscreen with 16M colors
    • A 5.0-inch display
    • Internal memory of 8 GB with the possibility to add a microSD card up to 32 GB
    • A removable 2540 mAh battery, which offers you 10 hours of talk time and 350 hours of stand-by. (according to tests)

    Pros

    • Fast processor
    • Good front camera
    • 4G-LTE Support (the LTE model only)
    • Great design

    Cons

    • Weak RAM
    • 3.4 GB out of 8 GB Internal memory is usable

    You can buy this smartphone from Amazon.
    This smartphone is currently unavailable.

    ---
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  9. Buy Nokia Lumia 735 (from $69.99)

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    Lumia 735 is a very good low-cost smartphone, featuring HD screen, 5 MP front facing camera and a long battery life. On the negative side, this phone is known to often have some software issues.

    Its key features are:

    • Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10 OS
    • A Quad-core 1.2 GHz Cortex-A7 processor
    • 1 GB RAM
    • 6.7 MP camera with autofocus and a 5 MP front camera
    • OLED capacitive touchscreen with 16M colors
    • Its 4.7-inch display is protected with Corning Gorilla Glass 3
    • Internal memory of 8 GB with the possibility to add a microSD card up to 256 GB
    • A removable 2200 mAh battery, which offers you 17:30 - 20 hours of talk time, 08:20 hours of web browsing and 10:20 hours of video playback and up to 600 hours of stand-by. (according to tests)

    Pros

    • Fantastic screen
    • Fast performance for the money
    • Excellent battery life
    • Good front camera

    Cons

    • Lacks dedicated shutter button
    • Small internal storage

    You can buy this smartphone, which is rated with 3.4/5 stars, from Amazon.

    ---
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  10. Buy Microsoft Lumia 640 XL (from $100)

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    If you are looking for a big screen smartphone and you're on a tight budget, you've come to the right place.

    You can buy Lumia 640 XL for a very affordable price and you can play mobile games with a nearly same experience as with two to three times more expensive smartphone models.

    Besides the affordable price, this phone dominates in a battery duration and a thick construction segment.

    Its drawbacks are a low internal storage and low specification ratings.

    Its key features are:

    • Microsoft Windows Phone 8.1 with Lumia Denim
    • A Quad-core 1.2 GHz Cortex-A7 processor
    • 1 GB RAM
    • 13 MP camera with autofocus and a 5 MP front camera
    • IPS capacitive touchscreen with 16M colors
    • Its 5.7-inch display is protected with Corning Gorilla Glass 3
    • Internal memory of 8 GB, with the possibility to add a microSD card up to 256 GB
    • A removable 3000 mAh battery, which offers you 29:46 hours of talk time, 10:14 hours of web browsing and 08:40 hours of video playback. (according to tests)

    Pros

    • 4G-LTE Support
    • Large screen size
    • Affordable price

    Cons

    • Low internal memory (8 GB)
    • Low RAM (1 GB)
    • Laggy performance

    You can purchase the Dual SIM version of this smartphone, which is rated with 3.9/5 stars by customers, from Amazon.

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