T-Mobile Informative - Wrong SIM cards for international cell phones
SOUTH CAROLINA -- T-mobile has great advertisment and a friendly (not necessarily competent) customer service - but that's it. The coverage in the Southeast of the US is poor (which is in contradiction to the maps they show in their sales points).
They are also unable to deal with international customers who own unlocked cell phones: T-mobile handed me out an inappropriate SIM-card. It didn't support my cell phone reliably. So they blamed my cell phone and charged me 200 USD cancellation fee. I am still fighting to get it back...
The Cingular representative gave me an appropriate SIM-card. My cell phone has worked reliably with them.
To all foreigners: Mobile communication in the US costs a fortune, but is much worse than in Europe or even China, India or the Islamic Republic in Pakistan. Welcome to the US!