LG G3 not connecting to cellular network after screen repair

[MrTuRtLe03]

One-man-shop owner in my community here. I work with many different computers, cell phones, and other technology. One of my more recent repairs involved a display assembly replacement on an LG G3. I replaced the lens, digitizer, LCD, and frame from an assembly I purchased. The repair went smooth and I gave the phone back to my client with the screen working A-OK. Now, the phone will not connect to the cellular network. When the phone boots up it keeps "Searching for Service" and will not connect. It will sometimes display one bar of service with the 4G icon showing activity via the up and down arrows, but I still can not make calls or receive texts on the device. It will connect to wifi networks just fine. The phone would receive calls and whatnot before the repair (according to the client), so I think I messed something up during the repair. That's not a problem though, it happens, so I took the phone back and looked into it - but I am not sure where the cellular antenna is to check the connections on or anything. Any ideas?

 

[i7Baby]

Sounds like something still not connected properly. Double check all connections.

If its on warranty, put it in for a warranty repair or replacement.

 

[MrTuRtLe03]

I would agree with something not being connected properly, but I am still having a hard time figuring out what it is. There IS a metal tab bent on the daughter board near the bottom of the phone, but I don't even know what that board does. I can't find any information about that little board on the net - as for what it does anyway. What really throws me is that I can browse the internet over a 4G connection, but my service bar stays at one bar. Correct me if I am wrong, but I thought that data and calling/messaging used the same antenna.

 

[i7Baby]

Yeah - they do.

 

[KoreyBowling]

I have the exact same problem after a screen repair. It worked fine at first then started acting up. Able to use the 4G connection for internet, but cannot do calls/texts - which is very confusing to me. I assumed it could be something to do with the smaller board on the bottom but I am also not able to find any information about what this board does. I know this thread is old but hopefully somebody can help now!

 

[ickycanine86]

I have the exact same problem after a screen repair. It worked fine at first then started acting up. Able to use the 4G connection for internet, but cannot do calls/texts - which is very confusing to me. I assumed it could be something to do with the smaller board on the bottom but I am also not able to find any information about what this board does. I know this thread is old but hopefully somebody can help now!

Did you find out ? I'm about to try and change my frame and wondering if it is necessary to transfer this as I hear I is a little difficult to remove.

 

[thenoaman]

One-man-shop owner in my community here. I work with many different computers, cell phones, and other technology. One of my more recent repairs involved a display assembly replacement on an LG G3. I replaced the lens, digitizer, LCD, and frame from an assembly I purchased. The repair went smooth and I gave the phone back to my client with the screen working A-OK. Now, the phone will not connect to the cellular network. When the phone boots up it keeps "Searching for Service" and will not connect. It will sometimes display one bar of service with the 4G icon showing activity via the up and down arrows, but I still can not make calls or receive texts on the device. It will connect to wifi networks just fine. The phone would receive calls and whatnot before the repair (according to the client), so I think I messed something up during the repair. That's not a problem though, it happens, so I took the phone back and looked into it - but I am not sure where the cellular antenna is to check the connections on or anything. Any ideas?

I have the exact same problem after a screen repair. It worked fine at first then started acting up. Able to use the 4G connection for internet, but cannot do calls/texts - which is very confusing to me. I assumed it could be something to do with the smaller board on the bottom but I am also not able to find any information about what this board does. I know this thread is old but hopefully somebody can help now!

I have almost the same problem, my connection is on and off...
Did you managed to fix it?

 

[Toni_22]

Yes

 

[thenoaman]

Yes

How?
Did you replace the daughter board?