Which version is your a G3 or G4,post IPL/SPL...?.
Download official carrier's Rom from it's website,force your phone into Bootloaders mode (multicolor screen),connect the phone with pc via usb cable,check a small usb appear at the bottom of the bootloader screen in your phone and run the flash,it'll recover back to it's default working status.
IPL 2.26/SPL 2.26/GSM 2.69.11
TNT 19213 Series Professional Edition
"Anything you still can't cope with is,therefore,your own problem.