Mi Smart Band 8

Battery failure (not gradual wear/ageing).

Screen defects (like dead pixels, abnormal discoloration) not caused by impact.

Malfunctioning sensors (heart rate, GPS, etc.).

Hardware failures (motherboard, charging circuitry).

Defects in materials or assembly.

The warranty becomes void if the damage is due to:

Physical Damage: Cracks, scratches, or broken displays/bezels from drops, impacts, or accidents.

Liquid Damage: Water damage beyond the rated IP/ATM resistance. If your watch is rated for 5ATM and you take it deep-sea diving, damage is not covered. Always check the specific water resistance rating.

Unauthorized Modifications/Tampering: Opening the watch, trying to repair it yourself, or using non-original parts.

Wear and Tear: Normal deterioration of the strap, case finishing, or battery capacity depletion over time (e.g., the battery doesn't last as long as when new).

Use with Non-Standard Accessories: Using unauthorized chargers that cause damage.

Software Issues (often): Software bugs, third-party app issues, or data loss are generally not covered under the hardware warranty, though they may be fixed via firmware updates.

Missing Documentation: Not having the original invoice/warranty card or if the serial number is tampered with.

Purchases from Unauthorized Sellers: Grey market imports or non-authorized retailers may not be honored by official service centers.