Enable Field Test on iPhone

Have you ever wondered how to enable Field Test on iPhone? If yes, I have the solution!

To enter Field Test on iPhone:

• Enter "Phone", dial: *3001#12345#* and hit "Call"
• Press and hold the Power Button, until you see the "Slide to Power Off" slider. Then, leave the Power Button and press and hold the Home Button until you leave the Field Test utility
• Press the signal bars to change between Field Test and normal signal bars

If you want to return to normal signal bars only, go into Field Test again and instead of pressing the Power Button, just press the Home Button once.

How to read Field Test:

• Anything over -80 is good and it's represented with many bars
• Anything below -100 is bad and it's represented with few bars

[via OSXDaily]