My samsung f41 has conference call issuePlease fix it in software update...Upto 4 members it has no problem...More than four means i cannot find option merge only swap option is coming...Please fix it in software update

I recently bought this phone for my sister as I am using M30s whoch is good and impressed meBut in f41 i noticed some problems please fix this "Team samsung"1) The battery : Both M30s and f41 have 6000 mah but in real f41 not giving that much backup ...

After the battery change also same problem repeatsSuppose The battery percentage is 80, when someone calls me it restarting automatically during the call......Solution please