Improving your daily energy starts with understanding your sleep patterns.
Accurately tracks sleep quality. Tracks heart rate during deep and light sleep. Helps you adjust your sleep patterns.
A light vibration gently wakes you up for a more comfortable morning.
Mi Fit app
Records your health data to help you get the most out of life.
A POWERFUL TRANSFORMATION
24/7 Heart rate monitoring keeps you safe and healthy.
24/7 Heart rate monitoring
Safeguard your health at all times. Alerts you when your heart rate is too high.
Stay active as you get reminders to get up and get moving.
AN ENDURING TRANSFORMATION
Stays by your side for 20 days on a single charge.
* Water-resistant up to 50m. Water-resistance is in accordance with GB/T 30106-2013 standard. Testing performed by the National Quality Supervision and Inspection Center for Watches. Mi Smart Band 4 water resistance report code: QT1902005;
* Mi Smart Band 4 lasts up to 20 days on a single charge according to Huami Laboratory testing: Tested using default settings, with 30-minute automatic heart rate monitoring enabled, receiving 100 notifications per day, 2 alarms per day, vibrating for 5 minutes, touching the touch button 10 times per day, and syncing with the app once per day. Actual results may differ due to differences in environment, use, and settings.
* "39.9% larger display size" is in comparison to Mi Band 3. Mi Band 3's display measures 17.26mm in length and 9.66mm in width. Mi Smart Band 4 measures 21.6mm in length and 10.8mm in width. Calculated as (10.8*21.6-9.66*17.26) / (9.66*17.26), the Mi Smart Band 4's display is 39.9% larger than Mi Band 3's display.
COVID-19 SHIPPING UPDATE
Please note: we ship all our items using Royal Mail. Royal Mail is experiencing service delays due to increased mail volumes and reduced staff numbers due to the pandemic. Please visit Royal Mail for more information. These will affect both the UK and International orders.
All orders placed withWe Sell Mobile Phonesbefore 2 pm on Monday to Friday will be posted to you the same working day. Orders placed outside these times will be processed on the next working day (excluding bank and public holidays). Working days are Monday to Friday.
Delivery Options Courier Cost Estimated Delivery
2nd Class Standard Post (UK) Royal Mail FREE 3 - 5 working days after dispatch
1st Class Standard Post (UK) Royal Mail £5.85 1 - 3 working days after dispatch
Although Royal Mail 1st Class delivery can take between 1 to 3 working days from the dispatch date, it's been our experience that the majority of packages arrive just a day or two after this estimated delivery period.
Any orders with a value over £100.00 will automatically be sent via a Royal Mail Recorded service, a signature will be required.
The estimated arrival times are taken directly from information provided by our couriers. These are estimates only. We Sell Mobile Phones are not responsible if this varies.
All deliveries will require a signature on the receipt, apart from those delivered using the Royal Mail Standard 2nd/1st Class service (UK). However, where the value of your total order exceeds £100.00, we will send the goods via a Royal Mail 'Signed For' service free of charge, unless the 1st Class or Special Delivery option has been selected.
In exceptional circumstances, we reserve the right to use alternative couriers.
Saturday deliveries are at the discretion of the couriers. It is our experience that in most cases they do choose to deliver to residential addresses on Saturday mornings.
When you sign for a delivery, you accept the item in the condition it arrives. Please ensure you check your item before signing for it, as we cannot be held responsible for the condition of an item once it has been signed for and accepted.
If goods are returned to We Sell Mobile Phonesbecause of a failed delivery for any reason, the carriage cost is non-refundable. We reserve the right to charge for any extra carriage costs incurred to re-send the goods.
For missing or delayed items please note that we have to wait 15 days after the estimated delivery date before we are able to consider action such as a replacement or refund.
because of a failed delivery for any reason, the carriage cost is non-refundable. We reserve the right to charge for any extra carriage costs incurred to re-send the goods.