Hello friends my Samsung is 8 months old the model number is Samsung m30s and from last night it is restarting automatically sometimes it stucks at Samsung logo animation please help me

i love my samsung j7 prime but every time any software update fomes, this phones battery performance is not well.... it charges slowly and also drains fastly compare to phone in previous software. please tell how can i fix this???

yesterday i update my j7 prime to naugat, but today when i charged it 100% after disconnecting from charger, and i unlocked it, then its screen was too much bright.. i tried auto brightness on - off, outdoor mode, but no changes happened in brightnes...

I updated my galaxy j7 prime to latest 7.0 naugat, why its consuming too much battery.100% to 10% only in 4 hours.in 6.0 it was 100% = 10 hours