iPhone Field Test Mode Signal Strength Indicator
A slick trick to seeing a numerical indicator for your cell signal strength is to use Field Test Mode. You can access Field Test Mode by dialing 3001#12345# from the dialpad. I'll show you how that works and what those decibel indicators represent. This works on iPhone 6, 7 or 8 and IOS 10.3.1 or higher.
#seletraining #iphone