My iphone4 says invalid sim or no service?
My iphone4 was given to me from my aunt and when i was activating it as mine, i had a problem when i connected to itunes, it says my iphone doesn't support my sim card, so later, i put on my aunt's sim card than it connected to itunes and its done. So now my iphone 4 shows menu bar but when i insert my sim card, it says 'no service' or sometimes 'invalid sim card'.
Your iPhone 4 may be locked to it's Network, that's why it shows invalid sim. In order to use other carriers, you need to unlock your phone. You can unlock your iPhone 4 by Remote unlocking. The unlock is permanent and you can get this unlocking service from online sites.http://www.theunlockarena.com/apple-iphone-4/rs13wp9/ is where i unlocked my iPhone. Check it out!
If the phone is past its 2 year contract, the carrier will unlock it if you call them.
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