I changed the APN, no affect.
I moved to Netherland to get an other Mobile Provider no effect.
I bought a SIM Card from an other Mobile Provider no effect.
With the Vodafone SIM Card and when I want to connect a pop up shows "Modem not ready". But sometimes it shows the details of a connection Cell ID, Provider name, transferred Bytes etc. then it drop off.
When I use the Telecom SIM Card I get all the details of the connection, but I can't connect to a Web Side.
Thank you for your help.