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What do bars mean?

Bars on a cell phone usually are not an accurate measure of cell phone strength.  They are like a gas gage, they give you an idea of what a the signal is, not the actual strength.  You can have two different brands of cell phones next to each other using the same carrier and they might show different bars.  Some carriers have bragged they have more bars than anyone else.  Once the carrier knows you have enough signal to make a call and talk, bars can be displayed anyway they want and the caller does not know the difference.

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