1. Data Speed Indicator2. Inbuilt Data enable/disable for individual apps.3. A perfect app lock (S secure has limitations)These are very basic features nowadays and almost every brand is providing irrespective of the prices.
I think you should wait for Samsung A52.it will surely come around 20k. Else if you can't wait for a month then go for M51 or M31s. if you are a normal user (not a heavy gamer) then go for M31s, it's value for money and it is working perfectly.