I got a new phone running android 4.2.2. Everything works as expected except that when I try to configure the access point name I can't. This is because whenever I enter mobile networks > access point names, it appears to open and immediately closes thus making it impossible to enter APN details. I tried other APN software but in all the app crashes. I am sure that phone is capable of using mobile internet because it can detect 3G signals.
What can be done?