Talk:Germany/@comment-77.125.107.134-20170304063645/@comment-24682153-20170304183019

Sounds like a nice trip. This what I'd do as Google and WhatsApp doesn't sound like a lot of data. Get your SIM in Munich downtown (probably not at the airport) in a flagship store of one of the three majors: Telekom (pink), Vodafone (red) or O2 (blue). This is no problem as long as you don't show up on a Sunday. They will sell you a starter for €10 with a 1GB data valid for Germany + Austria. Let them help you with registration and activation as this can be tricky for foreigners.

In Austria you will see if you need more data (leave a chunk for your return trip on the German SIM as German data is expensive on an Austrian SIM). You can buy another SIM there for lower prices and no registration is required in Austria if you need it for more data or just continue to use your German SIM at German rates without roaming surcharges.

Have a good journey.