samsung ch@t222 GT-E2222 some comon issues

samsung is a good cell phone but it has some common problems, which aee given below:
(1) you can not record your call during talking on phone, its very common problem
(2) you can not reply from your second SIM via SMS, Whenever a call is active on your primary SIM
(3) whenever you download opera mini from m.opera.com, it is an error downladed jar are invalid occured again and again. if you dial *52828378 code and icrease java heap size either MIDP size but it not ever be cured that cause