No. Your pump’s data is always safe within the pump itself, and if you uploaded it to the t:connect web application previously, your data will also be saved in the cloud. Once you connect your pump to the t:connect mobile app, you will continue to upload your pump’s data to the t:connect web application online.
Tandem handles issues with the connection between your Dexcom transmitter and t:slim X2 pump, questions about calibration, the “---” display, and sensor failures after the 2-hour warmup period. To report a sensor failure after the 2-hour warmup period, visit tandemdiabetes.com/G6Form
For all other CGM issues, including sensor failures 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.