Freezing and Loss of cellular network signal

devidart

Member
Jan 15, 2010
13
0
0
Hello.
SM-9500, 128GB, Snapdragon.

Three bugs:
1. Whatsapp Web constantly loses the phone. It helps if I go to the app on your phone. At the same time, the Internet is always available, with Telegram there is no problem in this regard. On Wi-Fi everything ok.

2. Communication (cellular network signal) is lost periodically. The phone shows the full scale of reception of the cellular network, the display is unlocked, but at the same time it is impossible to get call. After a while, sms come up about missed calls. Even Sim has changed - does not help.

3. The saddest thing. The phone freezing periodically. Once or twice a week. The first two times were at night, when standing on the charge. Once on the display, the Olways On Display picture was displayed (but did not move as in normal mode) and the charging indicator was on.
The second time the display was completely turned off, but the notification light was flashing.
For the third time, both the screen and the indicator were turned off and the phone was not on charge.

In all three cases, the phone did not react to any buttons, only the power + vol download buttons helped (it's strange that it's not just the power button).


Did anyone have something similar?
I do not want to do the reset and even more to carry in the service (it's not clear how to repeat last bug).

P.S. Sorry for my English.
 

devidart

Member
Jan 15, 2010
13
0
0
I understood the problem - it's switching the phone to 4G + mode.
when the phone is in standby mode, it is switched to 4G.
At the same time, it is impossible to receive a call or SMS, whatsapp does not work.
If I turn on the screen and open, for example, the browser, then the switch back to 4G + and the problem disappears (whatsapp works, calls and sms arrive).
This is confirmed by the fact that if I turn on the network mode only 3G / 2G, then there is no problem.

How can I turn off the transition to 4G + / 4G?
Or maybe I can somehow get the phone to correctly switch between 4G and 4G +?