CGM features and fixes · Medtronic Simplera

Medtronic Simplera warm-up: how long it takes

Warm-up is 2 hours for Simplera and Simplera Sync, with no readings until it ends. For the first 12 hours, use a meter reading for treatment decisions. (Medtronic user guide, p. 32; Medtronic user guide, p. 24; Medtronic user guide, p. 23; Medtronic)

What the maker says to do

1. Pair the new sensor with the phone, or with the 780G pump for Simplera Sync.
2. Wait 2 hours for the first sensor glucose reading.
3. Use a blood glucose meter for treatment decisions during the first 12 hours.

Simplera (standalone) sends readings to the Simplera app on a phone; Simplera Sync pairs with the MiniMed 780G pump, and the MiniMed Mobile app is a secondary display for the pump.

More on the Medtronic Simplera

• Follower app not updating
• Signal loss
• Sensor error
• Sensor failed early
• Alarms not sounding
• Follower not getting alerts
• Compatible phones

Warm-up on other CGMs

• Dexcom G6
• Dexcom G7
• Dexcom ONE+
• Dexcom Stelo
• FreeStyle Libre 2 and 2 Plus
• FreeStyle Libre 3 and 3 Plus
• Medtrum TouchCare Nano CGM
• Eversense 365
• SIBIONICS GS1

Sources, quoted

• Medtronic user guide, p. 32: “The sensor is warming up. This will take 2 hours.”
• Medtronic user guide, p. 24: “The first SG reading appears after the sensor is successfully paired and warm-up is complete.”
• Medtronic user guide, p. 23: “Do not use SG readings to make treatment decisions during the first 12 hours of wearing a sensor.”
• Medtronic: “The warm-up period lasts two hours.”

Every quote is checked against its source page before each update of this site; last checked 2026-10-06. Makers change their apps; the source page is the authority when it differs.