justrobin - 9:10 am on Aug 2, 2011 (gmt 0)
I think the limitation is in the handset or modem for receiving sms message. The standard is 160 characters as mandated in some codes. But some units now can receive more than 160 chars but still the sending and receiving is done by 160.
Perhaps if the standard maximum number of characters be changed, then we can have it increased.