OK after I posted today, I checked it and it was activated and I was on the network.
But that leads to other questions, which are difficult if you don't know German.
1) How do I check my balance? Can I text some number and get my balance back?
2) Can I top off via the phone or from the web site or do I need to buy the cards?
3) On my Nokia E61i, which is a Symbian S60 phone, it now shows access points for the following: E-Plus Internet, E-Plus MMS, E-Plus WAP. Access Points on this phone lists both Wifi access points and packet data connections.
But I think E-Plus Internet may only be GPRS, not UMTS. In any event, if I try to load a web page using this E-Plus Internet, it doesn't load.
They have a configuration page for data connections but no mention of UMTS:
http://www.medionmobile.de/konfigurator.php#INFO
Is it possible the info on prepaidgsm.net about UMTS is incorrect and that this prepaid SIM doesn't offer UMTS? The starter kit also has no references to UMTS.
I guess I can try to call the hotline and see if they speak English.
Also stopped by an E-Plus shop, to see if they were familiar with configuring the Internet connection. They were busy and when I spoke to someone, they didn't speak English so I didn't stick around. They had a demo of a laptop with what looked like a 3G card.