I'm looking for a phone for my father for around 20,000

Hey everyone! I need a phone for my father for around 20,000 INR. (+/- 2k) Criteria: 1. Easy to use 2. Smooth user interface 3. Good battery 4. Non buggy day to day activities like Calls, YouTube etc 5. Regular Software updates (safe for next 4-5 years) 6. Reliability (no major hardware or software issues) Appreciate for taking your time out to reply.