Q about cell-reception boosters

[Zong]

@ubengineering

strangley enough when i ordered some wire crimpers on ebay for 6$ the guy sent me one for free with the tool, i put it in my cell phone and had all bars all the time, didnt look at the brand and done have the phone anymore

I’m not talking about the ones you put in the cellphone.

I believe there are ones designed for cars which can also be used in buildings.