If your device doesn't perform as good as it is supposed to, and you have tried everything to fix it but nothing worked, you need to reset it.
There are two ways of resetting a device: hard reset (hardware reset), which involves deletion on all the data stored in your device and soft reset, which involves resetting the settings only, and not deletion of data.
Read the solutions carefully to avoid data loss, and other unwanted outcomes.
Note: Connect your device to the charger when performing hard reset to avoid sudden shutdowns, which can inflict an irreversible damage to your device. If you use iTunes on a laptop, plug the laptop's AC adapter in an power outlet.
Also, if you cannot access the recovery mode menu, maybe the power ON/OFF button or the Home buton are not working properly (In this case, take it to a repair store).
If you don’t receive the email in the next 2 minutes please check your junk folder, and add [email protected] to your safe sender list.