Device Guides
Apple iPhone 5
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iOS is the operating system software installed on your iPhone. To find out which version you have: Tap Settings, Tap General, Tap About, and view the version number.

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Search in Apple iPhone 5
How to
Unblock SIM
Want to unblock your SIM? It's easy, but you'll need a PUK to unblock your SIM.
The display tells you that your SIM is blocked.
Drag the arrow right.
Tap Unlock.
Key in your PUK and tap OK.
Key in a new four-digit PIN and tap OK.
Key in the PIN again and tap OK.
Your mobile phone is ready for use.