Pressing Enter key with an external keyboard doesn't send SMS on Panasonic P100 I am using a Panasonic P100. I want to use an external keyboard to SMS to my friend, but the Enter key is not working to send SMS.
The Enter key can produce 10 (hex 0A), 13 (hex 0D) or 10-13 (2 characters, 0A, then 0D), depending on the operating system it was actually designed for.  The SMS app may be looking specifically for 10 (0A), because that's the Linux EOL (end-of-line) code (and Android is running in a Linux OS).  Use the mouse to click the (in most SMS apps) forward arrow on the screen.  (Or try alt-10 - hold the alt key while pressing 1, then 0, in turn, then release the alt key.  That produces the Linux EOL character.)