Lg g3 sprint help please.

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I have been experiencing 4g connectivity issue the past 3 weeks. I have been running cm 13 rom for about a month or two with no issues. But then 4g connection disappeared and i was only getting 3g. After trying different fixes, i have narrowed down the the problem to prl issue. When phone restarts or battery is swapped, i get notification that sim card is not detected and only 3g data connection. Once i do a prl update no sim notification goes away and 4g works. Once phone restarts no sim message is back and 4g is gone. Any idea what the issue could be and how to fix it. Thanks.

 

[PhoneNoobs]

I have been experiencing 4g connectivity issue the past 3 weeks. I have been running cm 13 rom for about a month or two with no issues. But then 4g connection disappeared and i was only getting 3g. After trying different fixes, i have narrowed down the the problem to prl issue. When phone restarts or battery is swapped, i get notification that sim card is not detected and only 3g data connection. Once i do a prl update no sim notification goes away and 4g works. Once phone restarts no sim message is back and 4g is gone. Any idea what the issue could be and how to fix it. Thanks.

I dont have the rom so i cant give u an absolute answer here but I would try toggling off the battery saver because if its on and active it can unfortunately switch to a lower band to conserve battery so that would be my first guess. Switch it off and reboot.

---------- Post added at 12:13 PM ---------- Previous post was at 11:43 AM ----------

If that doesnt work try another method. Download shorcut master lite. On the top left click the 3 dots and select search. Type in Modem. Now look for the one on the list named com.lge.hiddenmenu.lte_only.modemsettings make sure u choose the right one they all look similar but that one says LTE_Only thats the one u want. now click it. Then press favorite so its there when u need it. Then launch it. Select modem settings, then select RAT selection click that. Here you will have a list like LTE Only, GSM Only, WCDMA Only, GSM/WCDMA etc.. But at the top you have Auto. Thats the one i picked Im pretty sure thatll connect u to 4G thats what worked for me