Video: how to see your iPhone's actual signal level, in decibels

Video: how to see your iPhone's actual signal level, in decibels

Behind the five signal “balls” in the upper left corner of your iPhone screen, there is a numerical signal measurement in decibels that goes from -40 (perfect sign, type next to the tower) a -140 (sign completely nonexistent).

In the video above, we have an old but very practical tip on how to “exchange” the balls for the actual signal level in decibels by simply typing a code in the Phone app (Phone) to open the ticket Field Test.

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