Apple has released their latest firmware update for iPod Touch, iPhone and iPad. The iOS 8.1.3 patches a lot of little security bugs and it only requires lower storage as well.
Based on tests made with the new iOS 8.1.3 firmware update, it has also improved Wi-Fi, Bluetooth, speed, app experience, LTE and battery life performance. The new iOS is worth installing given the bug fixes and better performance it provides.
However, it also varies from device to device (earlier versions of iPhone, iPad, iPod touch) and person to person.
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