These days I've been noticed that my iPhone 4S with iOS 9.2.1 has a lot of usage in the phone app, arround 80%-85% so I've to charge the battery 2-3 times a day.
In the battery usage section it shows that Phone App has "low signal" and the Whatsapp too... is there any problem with that? How could I fix this?
In the battery usage section it shows that Phone App has "low signal" and the Whatsapp too... is there any problem with that? How could I fix this?