I just got and activated my HTC Arrive today. I love it so far. The only problem is that I can't seem to send text messages longer than 160-characters long. I know that's a standardized limit, but on my old phone I could still type them out and the phone would send the message out in multiple parts. With WP7, though, it simply says my message is too long and grays out the send button until I delete enough of the message so that it's short enough. The WP7 "How-To" website says that I should be able to type a long message and it will automatically send it parts, but my phone won't seem to let me do that. Plus I have friends using WP7 who have had no problem sending multi-part texts before. What am I doing wrong? My phone is an HTC Arrive on Sprint.