I've gone ahead and ordered a new micro usb charger/microphone board since it looks like it has some connections/circuits for some of the antennas, so we'll see what happens in a few days. Is there any other board that is replaceable (other than the motherboard) with radio circuits/connections?

I live in Belize and bought it as Sprint "bad esn" note 2 on ebay.

I had it unlocked by the local mobile company, and worked perfectly for about a month.

One day I took the phone out of my belt case to make a call and the phone was completely dead.

No indicator lights, NOTHING. It would not power up no matter what I tried to do. hard reset, take out battery etc.

Then I got an idea to hold the power button down while I connected it to the charger to "jolt" it back to life, and IT WORKED!

But now it wont connect when trying to make a call.

It shows like it's calling, full bars, animated call screen, but there is no noise or message from the carrier or anything. Also cannot send texts.

The mobile co. re-unlocked it but still cant make calls. They couldn't tell whether it was software or hardware related either.

When I "jolted" it back to life something on the motherboard got fried?

I've rooted the phone and flashed several previous modem firmwares and non of them fixed the problem either. Also tried factory reset

My Note 2 can't make calls even though showing full bars, how can I test whether it's a radio/antennae problem or software problem or if something is fried on the motherboard? For more info please see my question I just posted, thanks for the great video!