IPhone 4 SIM lock for unknown carrier?
Someone gave me their old iPhone 4. I used a utility to install iOS 7 on it, but it wouldn't turn on without a SIM card. So I put my SIM card (valid O2 SIM) in and started through the process. I get to a "SIM Locked" screen and that's it. I'd rather not jailbreak the phone as the only reason I want to use it is for testing apps and websites in an authentic iOS environment. Can I unlock the phone by going to O2 or by doing something myself? I've seen tutorials online that cost a bit of money (no problem) but I need to know the current carrier and IEMI number (which I can't get at because I can't even get to the keypad).
Any suggestions?
Just get the person who gave you the phone to apply to their service provider for it to be unlocked.
It's free on most phones bought on contract. A small fee on pay-as-you-go phones.
You just enter the phone serial number & your (the owners) account info in a web form and the phone is unlocked a few days later.
The unlock system for iphones works by Apple sending an update to that specific phone via itunes, there's no "unlock code" entry facility or any other way to do it.
Most claimed online unlocks are scams, the few that can do it are cheating the system and sending an unlock authorisation to Apple for an exorbitant fee, many times the cost of the owner doing it.
To know your carrier lock status, use http://www.imei.info/check-warranty-unlock/. After knowing your carrier, you can get Remote unlocking method to unlock your iPhone 4 from network lock. You can acquire it from any of the online vendors like http://www.theunlockarena.com/apple-iphone-4/rs13wp9/ to unlock it
Iphone 4 imei 01 31 2800 928015 1
model md 128c
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