Sep 28, 2013
I have a S4 (SGH-I337M) with Android 4.2.2 installed on it, Not Rooted, Not unlock. My problem is with the WIFI and Network mobile serviec (GMS, 4G).
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1. when i turn the wifi on, it gives me fail to obtain IP, and at the same the mobile service detected my Mobile Network (Rogers) for moment then it turns to No service for few moment to come back to Rogers an other time and so on( like infinity loop between Service detected and No service).
2. usually when i turn off the WIFI, the phone goes to look for 4G network but this doesn't happen now, and still Mobile Service between detected and Not.
3. What has been said until now is with SIM card On. and i tried to take it out the phone and turn the phone on, and the same problem is still with Mobile Network service but now the infinity look (as I like to call it) is between No service and Insert Sim card, at the same time can't access to the WIFI (Fail to obtain IP).
i have tried several thing to solve problem : like changing the SIM card, Reset phone to factory setting, turn it off for while and open it, but the problem still excite.
it seems that it is software problem but i don't know which process responsible of Network Service setting (WIFI, 4G, GSM) so i can stop it and lunch it again.