Hey Gary, you just get a second SIM... you can get it from a vodashop - stick it in your paddling phone. Works on the same number, the phone that was last switched on gets the calls. I do this with my phones. Switch the iPhone to flight mode while I'm using the R250 paddle phone!
Rob
Currently Epic V10 Elite, Epic V10 Double.
Previously: Swordfish S, Evo II, Carbonology Zest, Fenn Swordfish, Epic V10, Fenn Elite, Red7 Surf70 Pro, Epic V10 Sport, Genius Blu, Kayak Centre Zeplin, Fenn Mako6, Custom Kayaks ICON, Brian's Kayaks Molokai, Brian's Kayaks Wedge and several others...