Phone [Q] Samsung galaxy m style

Hello i am new to forum!

I have big problem with my device,i have samsung galaxy m style SHW-M340S brand new phone but it's korian ,i cannot type more than 80byts(80 letters) sms it automatically turns into MMS.Non of sms apps supported,all unsupported,not even send message by them all failed!
It has ginger-bread 2.3.6 os.
Can any one help me for resolve this problem?
And also i need know can i upgrade this phone to ICS or later version?(There are no any official os upgrade but manually?).
If i can how can i do that?
Please help me!
Thank you,very good forum i learned lot.