That is not entirely true. The 8830 runs on international GPRS/GSM networks with a SIM card. The Storm runs on both international and North American GPRS/GSM networks. Notice how you will see 9530 users on AT&T, T-Mobile, etc. The Tour is the same as the Storm 9530.
I would imagine the 9550 would be the same. I haven't seen any specs to confirm this yet.
The difference between stupidity and genius is that genius has its limits.
When you take things for granted, the things you are granted, get taken.
Even a mosquito doesn't get a pat on the back until it starts to work.
Too many people miss the silver lining because they're expecting gold.
[BES 5.0.3 / GroupWise 2012 HP2]