CGM features and fixes · Medtronic Simplera

Medtronic Simplera signal loss: what the maker says to do

A Lost communication alert means the Simplera app and sensor have not talked for 30 minutes. Causes include the app being closed by the phone, the phone out of range, radio interference, or the sensor pulled out. (Medtronic user guide, p. 45)

What the maker says to do

Open the Simplera app and make sure it is running.
Keep the phone within 20 feet (6 meters) of the sensor, on the same side of the body.
Move away from cordless phones, routers and other radio sources.
Check the sensor is still inserted; if it pulled out, use a new sensor.

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.

Signal loss on other CGMs

Sources, quoted

Medtronic user guide, p. 45: “Check periodically to see if the app is still running in the background in order to receive alerts and SG values.”
Medtronic user guide, p. 45: “Make sure the mobile device and the sensor are located within 20 feet (6 meters). It is helpful to keep the devices on the same side of the body to minimize any radio frequency (RF) interference.”
Medtronic user guide, p. 45: “Move away from any equipment that can cause RF interference, such as cordless phones or routers.”
Medtronic user guide, p. 45: “Make sure that the sensor is still inserted. If the sensor has been pulled out from the skin, a new sensor must be used.”

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.

Medtronic Simplera signal loss: what the maker says to do

What the maker says to do

More on the Medtronic Simplera

Signal loss on other CGMs

Sources, quoted