I'm hoping for some advice on getting a SIM card in Europe primarily for GPS use for biking over a couple weeks.
I'm planning on buying a GSM sim card on arrival at the airport, which I understand is easy enough. I don't plan to make many calls, but I want to be sure I have a reliable data connection with enough bandwidth/data to use GPS for 5-6 hours a day.
Is there some particular provider that would be optimal for this (ie good coverage in both Germany and France, and not too expensive)? I'll be biking ~7 days total during my trip, so I'm also wondering how much data I should buy. (I guess I can top it up if I run low, hopefully that's easy to do via the phone itself.) Also I'm wondering if I can expect decent coverage in the French Alps.
I have a Tmobile prepaid phone in the US. I hear Tmobile offers some sort of service to its US customers in Europe if they have a postpaid plan but it appears I do not have access to this.