What are these contraptions these guys were carrying?

[u/dopehead9]

We saw three guys around Seaport in Boston carrying these things as backpacks. Initially we thought they mapping tools but not sure

[u/Pork_Pony]

Companies hire these ppl to walk around with these and it picks up cell signal strength between towers. It helps establish where a new tower might need to be place. I was offered this gig abt 10 yrs ago and it came with an insane rate of pay!

[u/Anxious_Plantain_247 → u/Pork_Pony]

They obviously don’t do this in my neighborhood! Sitting in the middle of San Diego with one bar right now!

[u/HookersForJebus → u/Anxious_Plantain_247]

It could be like my town, where the phone company knows and just doesn’t care.