if i remember correctly u have been using S2 for over a month now and u still don't know this :S
for starters try Go SMS pro free app on play store
and for longer sms
got to settings of ur OEM messaging app
there u will find the option for
convert sms to mms if length exceed 3 sms
untick it
atleast thats how it is in my phone
anyways guys am selling my Sensation check add here
and any idea for how much should i let it go?