There is no GSM-800 option in kalibrate-rtl unless it goes by another
name. I'm not that familiar with this technology.

" -s band to scan (GSM850, GSM-R, GSM900, EGSM, DCS, PCS)"

I tried all the options several times and the only hits I got were using
EGSM.

>
> OTOH, the OP said he was in the US and used EGSM band option ... huh
> ... I thought the US was GSM-800 ?!?
>
>
> Cheers,
>
> Sylvain
>