after mdm remove, you can reset, you can update.
xiaomi note 12 pro plus/ tested
xiaomi 13t tested
note 13 5g /13r pro mdm remove tested by Devices Fixer
if you want to check if your phone is supported to remove mdm, just download its firmware and check if there the cust file in fimware folder. if you find cust file, it means your phone can be unlocked
price is not fixed. it depends on flash auth price. for example, if auth v6 is 18 usdt, you will pay 18 for auth and 10 for fimware. if v5 and supported in any tool, you will pay only 10 for the fimware that i will make for you