I have one good used Samsung Tab S2 tablet computer. This is 4G LTE Verizon enabled. You would need to buy a sim card and data plan for it. Then install Lefebure's NTRIP Client or similar app. for streaming GPS corrections to your RTK receiver from a VRS network such as DigiFarm or the Minnesota VRS network. Communications with your RTK receiver is done by Bluetooth. I bought this unit from General Equipment. They had a couple of surplus units. This tablet is white in spite of it looking yellow in the photo.