Test iPhone Signal Strength and Antenna Reception

You can test your iPhone signal strength and antenna reception easily again, it requires the iOS 4.1 update or later, but will work on any iPhone 3G, 3GS, 4, 4S, or later. Here’s how: Activate the antenna strength test by dialing the following: *3001#12345#* Hit Call You’ll then see the signal bars be replaced with … Read More