The Dexcom CGM sensor can only be paired with one medical device (either a Dexcom receiver or t:slim X2 insulin pump) and one consumer device (phone or tablet) at the same time.
For example, you can connect your CGM to both your t:slim X2 insulin pump and your smartphone, but you cannot connect your CGM to both your t:slim X2 insulin pump and Dexcom receiver.
Always refer to the User Guide for important safety information and detailed step-by-step instructions on your t:slim X2 pump with Dexcom CGMs. Please consult the applicable user guide and refer to the table of contents.
Important note about Dexcom support:
Dexcom and Tandem have agreed which system issues are best handled by each company, including which company is responsible for reporting those events to the appropriate regulatory authority. To help ensure that the required reporting takes place in a timely fashion, customers may need to contact Dexcom for some issues and Tandem for others.
Tandem handles issues such as loss of connection (on pump only) and the invalid transmitter (Alert 29) on pump only.
For all other CGM issues, including would not accept calibration, the sensor failure during the 2-hour warmup, “no restarts” alert or physical problems with your sensor or transmitter, such as bleeding, bruising, skin reaction, adhesive issues, applicator issues, or broken wires, you should contact Dexcom using one of the options at dexcom.com/contact.