Help [Q] problem(please insert sim card)mytouch 4g

[newsam]

hi
i buy mytouch 4g in this week and device work very good and i insert sim card and work good ,,,after i make gfree root & i root my device s=off i get message please insert sim card i have put t-moble sim card & att sim card nothing work i get message (please insert sim card),,,& i unroot my device i get same problem ......
so any one have solution to fix the problem ?

 

[MyNamesTooLong]

Take it back now that its unrooted

 

[newsam]

Take it back now that its unrooted

i have unroot my device but i take limited service on device .

 

[MyNamesTooLong]

No, no, no...Return it to the store as a defective unit and get a new one. You usually get between 14-30 days to return something you purchased new

 

[newsam]

No, no, no...Return it to the store as a defective unit and get a new one. You usually get between 14-30 days to return something you purchased new

thank you for answer
yes,i wan to Return it to the store as a defective unit,,but when i unroot my device i don't get s=on ,i use this way to unroot :
How To: Unroot the T-Mobile MyTouch 4G | TheUnlockr
and i ask some one in website about i get s=off & i do all steps in unroot my devices in correct way .
he say:your device unroot but u get s=off its no problem.
i afraid to Return it to the store as a defective unit & the store don't accept this item.