[Q] 3g connection - LG Optimus 3D

i have lg optimus 3d from 1 year. when my phone is connecting to 3g is disabled the signal and i can't send or receive any call. and i am try a lot of roms and sim. the problem lies in the hardware. anybody can help me how can i fix my phone.

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[Completed] whwnever i turn on the 3g the sim signals got disconnected. It works ok on 2g or edge

I am using htc one m8. it supports 3g and 4g. but whenever i turn on 3g the network signals got disconnected. what is the reason and what is the solution. i have to restart my phone and after some time it becomes perfect. plz help me fix this problem. it is currently working on android 4,0 kitkat version.
Well that might have something to do with your carrier or it could be hardware. You can register if you like and ask your question here
Good luck

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LG G3 AT&T D850 SiGNAL RECEPTION ISSUES

Hello everyone! I've bought a used LG G3 D850 AT&T version. The problem is that whenever I'm inside any building or where the signal reception is low, the phone would simply give the "Emergency Calls only" notification. I've checked my sim card, my mobile network settings etc. but to no avail. Often when somebody tries to call at my number the operator says the dialed number is powered off whereas I'm getting full signal! This is so frustrating, I'd be glad if someone can help me here!

Signal problem unlocked with wind(ita)

Problem is not about signal force or 2g 3g 4g or area with no signal.
Its a complete problem that take away signal (sim call SMS and data).
And it appen any time without advice or any sense.
From 4g yt In 1440p to 0 signal.
I have read around of similar problem for g3 and all other g4
Found also a yt Video that give a metode with adb to solve it.
Any idea?
The phone have near 2yr from imei but it's refurbished with 1yr garancy from eBay. Bought recently arrived yesterday 1day of use
I cant found 4G LTE
my signal can"t found 4G
I haved jast 3G H+
Does it happen with only one SIM?
Or have you tried inserting other SIM cards and does this with other networks?

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