My 4s is 8 months old and the update went smooth and fine using wifi at home. I have 25Mbps connection at home.
I haven't seen any significant change in the battery life.
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| Even the brand new 4S was very slow in applying the OTA update.
But it worked, eventually.
I would just let it run over the night - or update via iTunes (if that is still possible). | |
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