(for mobile phones that support J2ME and MIDP 2.0)
JavaCallTester is a MIDlet (Java program for cellular phones) that tries to make a phone call. You can use JavaCallTester to test if your mobile phone warns about it or not (it should by specification).
It depends on the phone model. The easiest way (if supported) is to browse to this page with the phone and click on the download link above.
Q: The phone seems to make a call but I get an error tone, why?
A: It doesn't seem like 90510 can be called with the country prefix +46 in front of it. However it was never intended that the call should go through. 90510 was selected because it's an automated reply, a number that probably won't change for quite some time, and a number that has a fixed (low) cost to call. If the call should go through one day you shouldn't have to face bancrupcy. ;-) For the purpose of this test all you need to see is if the phone tries to make the call without asking you for permission first or not.
Q: I have a question that is not covered here. Where can I get help?
A: Send me
your question. I can't promise that I will have time to answer, but I'll do my best.