Gps suddenly not working

[Ampress]

4s on 6.1.2 haven't used GPS for many days but today needed it and it wouldn't work. Tried it with google maps, apple maps, endomondo and an app called GPS data. There is no position dot on the 2 map apps. Endomondo is continually 'searching' GPS data is blank. I recently accepted the OTA update to 6.1.2. Could this be the culprit? My friends 4s in the same location picks up GPS data perfectly?

Please help me

 

[Ampress]

Sorry. After activating all the location services I thpught all settings were good to go. Forgot airplane mode.