#3 Its WiFi Radio Is Finicky

The internet forums were a buzz saying about slow to nonexistent WiFi connectivity in their new iPhones, when compared to the iPhone 4 or 4S. MacRumor writes that was confirmed by the Apple Forum and said, that the issue for some users has to do with using a certain secure WiFi connection called WPA2. Moving to less secure WiFi connections resolves the issue, according to forums.

#2 The 'No SIM Card Installed' Error

When all that you were wanting after buying a phone is to get connected instantly, but with iPhone 5 it was a problem; users faced 'No SIM Card Installed' Error. Apple.com forum was full of such messages, and some of the iPhone users even shared some gyan asking the victim to press and hold both home and sleep buttons; if the problem continues, take it to Apple Store.

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