Last one month I used this Dell Streak tablet pc and now it will be gives the unseen problem. When I try to send the long SMS messages then it will be sent as an MMS messages. This happen in the last two days. Because of this problem I always being need to split the long character based SMS split into number of sun messages. This problem arrives when the characters on this text message is to be extend large than 160. I need perfect solution to solve trouble. Thanks for any help.