How to Change Default iPhone Service Bars Without Jailbreak iOS 7 and Below
Change your iPhone's boring service bars into detailed numbers!
Number to open field test app: 3001#12345#
If you want to get your original service bars back, either tap the numbers when on home or lock screen or re-open the field test app as I showed in the video and simply close it normally by pressing the home button once!
Thanks for watching!