Question - Replacing a Samsung A40. (opens in new tab)

HI, I am an Non Tech OAP that would like to replace my Samsung A40 with a similar sized (6.1) but more up to date mobile. The A40 is doing some very odd things, plays music when it wants to, sets alarms, dials out to some contacts or dials out to a jumbled up row of numbers. I cannot always get...