Recently updated my HTC Arrive to Windows Phone 7.5. I am unable to send any text messages using the foreign language keyboards. I've tried Russian and Greek keyboards. When the message is sent the recipient receives underscores for the number of characters in each word. I've tested by attempting to send to another HTC Arrive on Sprint, an EVO 3D on Sprint, and an iPhone 4 on ATT. Has anyone else run into this problem or can a representative check into this?