I bought the renewed Mi Smart Band 4 a few weeks ago after my old tracker stopped syncing, and I was skeptical about a refurbished unit. The band arrived in a generic box, but it included the wristband, a magnetic charger and a quick‑start guide. After charging it for an hour, I slipped it on and started using it daily.
Key Features
- The 1.1‑inch AMOLED screen is about 40% larger than the Band 3, making notifications and workout stats easy to read even in bright sunlight.
- 5ATM water resistance means I can wear it while swimming laps; it automatically detects swim style and logs distance, strokes and calories.
- Music controls let me pause, skip or adjust volume straight from my wrist, which is handy during runs.
- Continuous heart‑rate monitoring sends alerts when my rate spikes, and the sleep‑tracking feels accurate enough for me to notice patterns.
- Bluetooth 5.0 provides a stable connection to my Android phone, and the Mi Fit app syncs all data without lag.
Pros
- Large, bright AMOLED display that stays clear under sunlight.
- True 5ATM waterproof rating – I’ve taken it on pool sessions without any issues.
- Music control works reliably and saves me from fumbling with my phone.
- Battery lasts about 10‑12 days on a single charge, even with continuous heart‑rate monitoring.
- The refurbished unit feels like new; there are no noticeable scratches or worn parts.
Cons
- The generic box doesn’t include the original Mi branding, which feels a bit cheap.
- There’s no NFC for contactless payments, which some newer bands offer.
- The strap is a basic silicone; it could be more premium.
- Occasional Bluetooth drop‑outs when I’m far from my phone, though they’re easy to reconnect.
Final Verdict
Overall, the renewed Mi Smart Band 4 punches well above its price tag. It delivers a big, vibrant screen, solid swim tracking and useful music controls while still feeling comfortable on the wrist. If you’re looking for an affordable fitness tracker and don’t mind a generic box, this refurbished model is a smart buy. Check the current Amazon price and compare it to new units – you’ll likely save a good chunk and still get a device that performs like new.