Do mobile phone signal boosters really work ?

If they cost so little to make and add to the device, ask yourself why the company doesn’t do it themselves to make more money.

It’s a load of crap.

And I never saw one in the store I worked in, which is an authorized dealer for AT&T. You’d think if they could make an extra buck selling out more accessories, they would.

I’m with asmo

No, otherwise they would be incorporated in the design. Increasing antennae gain or making it more directional can help, but not a blanket omni-directional “boost”.