[imdarkside]

Seems you ought to be able to get gps to work without data connection. I guess that may depend on the hardware in the phone if they found a way to lock you out so you have to use data. If it were software, then the cooked roms that freed you to use GPS should have freed you from data requirements or there may be a project there for a cooker.

GPS units do not have data connection. they find the sats and work with internal software. Seems the phone should behave the same.