no service after screen replacement
my iphone6's screen was cracked and bent as well, so i bent the phone back to normal and replace the screen, but after i have done everything, i find that the phone can not receive signal, it just say no signal. i am sure the sim card is working ( i tried it on other phone). i think i might have damaged the phone when i tried to bent it back.
so how can i know which part need to be replaced? sim card reader? antenna ?