Originally Posted by uday207
Please share nvram backup, because even after writing imei and mac address with sn write tool, device isn't catching cellular signals.
Is ur device showing imei with *#06# ???? If yes, then flash ur phone using sp flash tools with upgrade option. After 1st boot, it must not loose imei. If it loosing, then something went wrong.
If so, reinstall ur drivers required for sp tools as well as for sn write station, then Format & flash with sp tools, write imei & mac address.