Some mobile networks, in some countries, will provide you with devices designed to strengthen the network signal, thus allowing you to enjoy the benefits of a full network signal.
Also, there are third party gadgets known as signal boosters, or repeaters, designed to pick up weak signals from the nearest network tower and produce a full powered signal indoors.
Note: Some boosters might use your Internet connection to supplement for a poor network signal. If you live in an urban area and if many people attach to your booster, they will drain your Internet.
If you live in an area where the network reception is weaker, you will need a stronger mobile device. Go to a store and purchase a mobile device which is able to get the maximum of the network you are subscribed to.
It's said that a 2G signal is stronger than 3G, so if the network signal is weaker, try switching to 2G. 3G and 4G are designed to deliver high speed Internet to smartphones, however, at a shorter distance between the network tower and the mobile device.
Note: Please bear in mind that a 2G Internet speed is considerably slower than the one of 3G.
If the network signal is weaker but your Wi-Fi signal is good, try calling your friends via an online service such as Viber, Facebook Messenger, etc.
Also, the Wi-Fi calling feature, which is inbuilt in the mobile device's of today allows your phone calls and text to be sent and arrive over the Wi-Fi network and once you are out of the Wi-Fi network, they will arrive on the cellular network.
In order to enable the Wi-Fi calling feature, you need to consult your carrier (operator) and ask them if this feature is supported.
Electronic devices can interfere with the network signal and make it weaker. Try placing your mobile device away from microwave ovens, TVs, etc. as far as possible.
If your mobile device fails to receive proper signal in a particular area, try forward your calls to another number that works fine in the same environment, provided that your operator supports call forwarding.
If there are too many object between you and the network tower you are connected to, the network signal will be weaker. But, the higher the position of the mobile device is, the less there is in the way to block the network signal.
If you live in a two-floor house, try going upstairs to make phone calls and or go out on the balcony (if you live in a house or an apartment/flat).
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