Apple released iOS 6.02 software update for iPhone 5 and iPad mini to fix Wi-Fi issue. It was released from yesterday morning since there are a number of complaints have experienced with Wi-Fi issue and hope to get it fix ASAP.
The last iOS software update 6.01 was released on November 1st to fix a screen glitch showing on onscreen keyboard and another issue with camera flash which it couldn’t go off. With this new iOS software update 6.02 should be better and improvement.
Here the instruction, before you go ahead, make sure you recharge your iPhone 5 or iPad mini and turn on Wi-Fi. After that, go to settings>General>Software Update then tap download and install. Or you can go to iTunes on your Mac and plug it then you can begin with Software Update. It should take you approximately less than five minutes.