If the Xiaomi Redmi Note 8 has water damage, the first thing to do is to immediately turn off the phone and remove the battery if possible. Then, dry the phone using a soft cloth and try to absorb as much water as possible. It is important not to use a hairdryer or put the phone in the microwave, as this can cause further damage. After drying the phone, it is best to place it in a bag of uncooked rice or silica gel packets to help absorb any remaining moisture. Finally, it is recommended to take the phone to a professional technician to assess the extent of the damage and make any necessary repairs. **

The Xiaomi 4 Pro comes with a one-year limited warranty that covers manufacturing defects and malfunctions. However, water damage is typically not covered under the standard warranty. It is important to note that water damage is considered accidental damage and is usually not covered by the manufacturer's warranty. It is recommended to purchase additional insurance or a protection plan that specifically covers water damage if you are concerned about this type of damage. **

The water cooling system of the Xiaomi Redmi Note 8 Pro is a passive system that does not require any maintenance or refilling of water. Therefore, it is highly unlikely for the water cooling system to dry out under normal usage conditions. As long as the phone is used within its specified operating parameters, there should be no issues with the water cooling system drying out. **

If your Xiaomi smartphone falls into water and doesn't turn off, the first thing you should do is to quickly remove it from the water. Then, turn off the phone immediately to prevent any short circuits. Do not try to turn it on or press any buttons as this could cause further damage. Next, remove the SIM card and any other removable parts, and gently dry the phone with a soft cloth. Finally, place the phone in a bag of uncooked rice or silica gel packets to help absorb the moisture. It's important to let the phone dry completely before attempting to turn it on again. If the phone still doesn't work after drying, it's best to take it to a professional for repair. **