Is it possible to increase the character limit when texting?

[thzone]

There's actually a reason for the 160 character limit when sending SMS.

SMS was designed to deliver short bursts of data such as numerical pages. To avoid overloading the system with more than the standard forward-and-response operation, the inventors of SMS agreed on a 160-character maximum message size.

It's not a convenience issue at all, it's a matter of system overhead. 160 characters fits inside of the check packet that phones/towers use to communicate.

(Reference http://communication.howstuffworks.com/sms.htm )