What's hardest on Siemens phones
On the C65 and CX70, the hard part is usually not Jimm itself but transferring the JAR file and configuring GPRS. The menu depends on the firmware, so instructions can vary by carrier and model.
How to diagnose a connection error
Check the APN, Java permissions, whether regular web pages load, and the connection type. If the account works in QIP, the login details are correct and the problem is on the phone or network side.