You can check your iPhone signal strength by using its secret Field Test mode. Open the Phone app and dial *3001#12345#* on the keypad. In a few seconds, you’ll see a mishmash of numbers.
You can check your iPhone signal strength by using its secret Field Test mode. Open the Phone app and dial *3001#12345#* on the keypad. In a few seconds, you’ll see a mishmash of numbers.