HOW TO FIX NO CARRIER IPHONE 4 GSM

[randyguzon]

is this another way to enable your 3g or carrier. . .
without using ultasnow? or using cydia?

My Iphone 4 GSM. .after Restore/Backup
No Carrier then can't find wifi devices.. .

what is the posible wifi problem cannot find wifi network?
the wifi is weak or need to repair?

what should i do to fix this problem. .
please help me as much as posible. . .

Thank you so much and GOD BLEASS