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.
For Dexcom continuous glucose monitoring (CGM) specific issues including calibration prompt will not clear, 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, please contact Dexcom using one of the options at dexcom.com/contact or report the issue online at https://dexcom.custhelp.com/app/webform.
Please see table for a full list of who to contact for Dexcom CGM issues.
Tandem handles issues such as loss of connection (on pump only) and the invalid transmitter (Alert 29) on pump only.