Is it safe to update my non-factory unlocked iPhone 4 to IOS 7?
When I check IMEI.info, it says my phone is unlocked. However, I know for a fact that I had a friend unlock it for me, so it isn't factory unlocked or done by a Carrier.
I'm currently running IOS 5, so it's definitely time for an update, but my phone itself is running perfectly, so I don't see the need to buy one of the newer iPhone models.
I currently am under carrier T-Mobile, and I purchased the iPhone about a year and a half ago, on ebay as a used phone from AT&T, if I recall.
A factory unlock can be done through a website by paying $5. If it's on IMEI info, it is factory unlocked. So you can update as much as you want without a problem.
Your phone will be locked automatically if you update your phone. So at first you need to factory unlock & then update
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