Does anyone have any idea why the ESN on a phone changes to MEID when you try and upgrade the OS on the phone. I currently have 4.3 OS on my 8330 and whenever i try and upgrade either to OS 5 or even OS 4.5 everything goes well but when i check the status my phone has changed to MEID. I wouldnt mind the change if my phone would keep working but it doesnt. I can still make calls but not receive any. Any help will be appreciated. Thanks