5s Upgrade ios7.1.1 no signal? IPHONE5S No signal solution

Solutions

1. In the Apple 5s we click ' Set '-' phone '---turn off ' dial power ' then shut down, unplug the SIM card, then power on, insert the SIM card;

2. ' Set '---' operator '----turn off ' automatic '----choose ' mobile ' or set to Automatic.

3. If the above methods are set, we can try the aircraft mode or restart the phone to see if there is a signal oh.

Plus, if the signal is unstable,

Cell phone signal is not good, or you are now located in the service area, or that is where the signal is bad.

Friendly tips, if the above method is set after still no signal we can upgrade to the ios7.1.2 version of the system to try Oh.