Phone cuts out or reception bad when talking on the phone KXTGA641

try this simple test
start the car and hold at around 1000 rpms until the engine warms up
now place it in gear with the handbrake on ( don't touch the foot brake
if it is idling at around 800 rpms and is smooth, apply the foot brake
if it plays up , replace the brake booster as there is a vacuum leak upsetting the idle mixture setting
recheck by allowing it idle in neutral with the hand brake on and the apply the foot brake

Did you change phones? Sim cards? I am assuming you have the same phone, and they switched out the sim card (or maybe not?) when you changed plans.

Also, all 4G phones are also 3G and 2G phones, and they simply pick the best available. So if you lose 4G coverage, it will simply switch to the wider 3g network and when you're really remote, drop to 2G. This effects data speed primarily, there isn't any qualitative difference between them for voice and text.

It sounds like you might have something screwy with your sim card when the plan changed happened, I would call T-Mobile or visit a store and ask for a new sim card and be vocal about the poor reception after the plan change. Changing plans shouldn't normally effect reception, only changing phones/networks.

I myself experienced reception issues like yours, and the problem was a bad simcard. I'm sorry for the vague answers, but I think your best bet is to go to a T-Mobile store. They should replace the sim card free of charge.

I HAD THE SAME ISSUE WHEN I TRANSFERED PHONES, AND I FIGURED I DIDN'T NEED TO ADD THE LOCAL OR SAME AREA CODE AS ME FOR IT TO WORK, BUT YOU DO !!

you have to call the service provider to resolve

How new is the amp?

A single faulty solder can do that...I'd try returning in to the seller.
Have you tried a different amp with the same equipment?

Sounds like a wiring issue.

Hope I've helped
PvT

Your phone is under warranty and so Nokia must give you support for the problem seen. The SIM card detection pins can be dirty or loose and so the contacting could be bad but being a new phone it is not possible. However it is best to remove the SIM card and wipe the contacts with some spirit and a cotton bud and wipe it clean to have a polished surface.
If there is a loose fitting of the SIM then this must be complained.
However as you have observed if the fault is intermitent it can be due to a faulty mother board, possible poor solder joints or tracks that are cracked.
In this case you MUST get a free service or part replaced and so DO NOT TAMPER THE SET until you show it to NOKIA CARE.

Your problem isn't your service provider-its your phone! I have a different LG phone than you, but from my own experience and what i have heard from many people who have LG phones, they all have reception problems. LG phones have terrible antennas in their phones. I'm trying to work on a solution to that now, if its possible. Contact me(True Love in DC) in a week to see if i discovered any solutions. In the meantime, a good thing to know about reception with ANY phone is this: the antenna is always at the top of your phone. Avoid holding or placing your hand and fingers near the top of your phone. And NEVER bend over while talking on the phone as u will be pointing your phone towards the ground. This almost ALWAYS cuts off your reception or even disconnects your call in progress. Learn the best reception spots in and around your home and other places you may be at too. Avoid walking around while talking on the phone. Certain buildings or parts of buildings play a part in your reception as well as certain lighting in the building. And finally, atmospheric conditions(storms, cloud cover, etc) are a big contributer in reception problems!

Not the gas,never going to get any gas that will
ever be that bad, that you will notice anything

Have to go over entire vehicle until you find an issue

The days of break down & fix, have been over for 20 years

You drive all year & do not perform any checks or testing,
once or twice a year you got problems

No one will spend any money for no reason

No repair shop will have a clue what I'am talking about

It gets expensive when you ask a shop to solve any issue
They pick & choose what they want to do

They seldom just diagnose your drivability issues
You get all sorts of parts & so called tune-up non sense
that has nothing to with why your there

Good Luck

I've repaired mine in on mountain a few times with super glue. Not my first choice but it does work. As for a permeant repair I would talk to K2 about the issue, I've talked with them a few times and they generally are a decent group to deal with.

limeted service i have this problem on one sim that i want to use but no problem on the sim i dont want
pleeze help