What is a "No Cell Phone Signal"? The Most Authoritative Explanation.
Why my phone says no signal?
This means a couple of unique things for 911 calls. First, even if the phone does not have a service plan attached to it, it can still call 911. No service/no bill, doesn't matter, your phone is still allowed to make 911 calls.Why is there no cell phone signal at my house?
Where your phone shows bars, wireless industry folks measure signal in -dBm. A number higher than about -90dBm (like -80 or -70) is a strong signal. Get down below -110dBm and it's definitely a weak signal; below -120dBm and you'll have trouble holding onto any signal at all.Can a cell phone with no plan still call 911?
What is the strongest cell phone signal?
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