Yes i also suggest powering off & re-starting (as mentioned above @Mana @NDesai mentioned although since it's an add-on to same PM SIM it should work as you cross the border. We got this abut 6 months ago & it all worked just fine (I don't recall having to do anyhting special - just worked by connecting to ATT once lost PM signal, as i recall -assuming your cellular setting is to auto).
It is a little less data than we typically have on PM so a ocoue quick tip:
- if you use Google maps for driving you can download & save maps for your routes either at home before you go or each night using hotel wifi (or coffee/ meals places).
We didn't even use all the data for our 12 day trip (obviously the plan didn't last whole trip). I bought it on line as we arrived at the first hotel as didn't really need it the first day & ran out at midnight of day before returning home. I know the USA border routes prety well so didn't need data at either end of trip.
