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I have successfully updated my Iphone with iOS5.1.1, however the device doesnot identify SIM card after the upgrade. can you help me?
Most likely your phone previously was carrier unlocked using an unauthorized method. When you updated, it was re-locked to the origninal carrier.
Most likely your phone previously was carrier unlocked using an unauthorized method. When you updated, it was re-locked to the origninal carrier.
when first open, "place a sim card". and "no SIM" is shown in the status bar instead of cell signal.

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