How to Display Your iPhone’s Signal Strength in Numbers
The little circles in the corner of your phone’s screen might be cute, but they’re very imprecise when it comes to displaying its signal strength. What do four dots mean, instead of five? Only the designers of iOS 7 know.
Luckily, there’s a way to display a more exact signal on your Home screen — information that’s particularly helpful when you’re in a place with bad service and need to wander around for a better signal.
Here’s how you do it:
1. Start by going to your Phone app.
2. Then go to the dial pad.
3. Enter this weird code — *3001#12345#* — and tap Call.