Why doesn't my iPhone 3GS recognize SIM cards?
I received an iPhone 3Gs locked. I unlocked it to find it doesn't recognize any SIM cards, so I am unable to get cellular service from any provider in my area. I've got three options in my area. LongLines Wireless, iWireless, and the dreaded AT&T. I have SIM cards from LongLines and iWireless. Here's the kicker. I also have an original iPhone that I'm currently using. Both SIM cards work in the original iPhone. I've done the standard restart/hard reset/reset network settings/restor
This has to be a problem with the SIM card slot, which is soldered down to the logic board. It's possible that it's a mechanical problem -- you might be able to open it up and discover that the card-detect switch is failing to detect SIM card insertion. Otherwise, you're going to have to replace the logic board.
Hello shai I dont exactly know the technical reason of why your iphone doesn't show signals after being water damaged.the good thing is that the phone shows signals some times now there might be some problem with the sim tray slot if you check the sim slot internals there is a gold pin at the end of the slot which is pressed by the sim tray and to force the hardware to start searching for a sim card try pressing gently on the head of the sim tray and keep pressing until the phone shows signs of signal since the sim tray is small take a small rubberized pin and force the sim tray at the middle ( all the force is for the golden pin push ) if that doesn't work then try sending it to a repair shop. Since the phone is water damaged
This is merely a theoratical suggestion if it works thumbs up for you I don't take any responsibility of the damaged caused to your phone by following this suggestion
Good luck :)
you need tyo restore your phone to factory settings reinstall apple iTunes on a new sim with tmoile or usa at&t sim then after you've synced the iphone with the computer and iTunes replace your old sim and it will work fine heres the method step by step - happens a lot with jailbroke phones
The reason this happens is just so you know , the os system has been updated and your jaikbroke phone isn't being regognized with the right settings , this happened after a apple update a year or two ago . The actual logic behind the solution is simple . You must find a sim that preferably is a contract which will have data plan options you don't need to buy the data plan of them your just borrowing it so it can regognize your old sim that suddenly stopped working . use a friends sim aslong as its contract remember it has to e the same network the phone was originally on which I find mostly is t mobile in uk or at&t in the us .
Factory reset your iphone then with old sim not regonized it should say activate or a message along those lines . insert the borrowed contract sim and your usb to your iphone and laptop making sure you have a up to date iTunes installation on your laptop it will start the process on its own once plugged in just wait a good while may need to replace wire a few times but it will start to sync with the borrowed sim .
After synced and all finished your phone will be working again with the borrowed sim now add your old sim it can now recognize the operating system and network provided settings allowing your old sim to work again resync through usb and then give back the borrowed sim it will be fine now.