Call your carrier. They are the ones that control the rings since the voicemail service is on their end. Some carriers allow you to change it online after logging into your account. But not all of them do that. ... View more

A "hard boot" is just turning the phone power off and turning it back on.  That won't do anything to the existing setup or data on the phone. If you mean "factory reset", then yes, that resets the phone to a fresh "out of the box" condition.  If you think someone actually messed or changed the SIM, then go to your carrier and have them look at it - make sure it's the same SIM they originally gave you to put in the phone.  Better yet, ask for a new one, with a new number even.  I mean, if you think they really did do something. But honestly, unless you are a government or corporate employee, and these wrong people are into government or corporate espionage or in a drug cartel, I seriously doubt they have any way to mess with the SIM card that won't immediately flag the carrier that it's been tampered with. ... View more

According to Samsung's own published schedule (Google it), the A71 is supposed to get it around May 2021. Now, they don't specifically call out the 5G variant, so it could be for the older Jan 2020 device. The 5G version is technically a newer device with the Exynos SOC or different Qualcomm (depending on carrier and location), and wasn't on that initial list. But neither was the S20 FE 5G. The FE, however, was just recently announced to be getting One UI 3 before the end of the year. It's possible that the A71 5G will get it before the regular A71 does. But, I'd just be speculating. ... View more