Can anyone tell me how to go to recovery mode ....i tried but can't.

Dear Samsung team, if some called me for 20 times a day the call list is not merged and shows the number for 20 times in list . so we lost the old calls data .please update call log as old samsung feature phone

will s8 get dual volte ( dual 4g) after pie update

when we get june security patch update for s7 in india