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The replacement pump you received may have software features that were not included on your original t:slim X2 insulin pump. Please use the table below to see what has changed.

Current Software Version

To find your pump’s current software version:
Home screen > Options > My Pump > Pump Info

Software Feature v6.0.4* v6.3.1* v6.4.0* v7.3.1 v7.4.0
t:connect® Mobile App Compatible
Basal Limit  
Configure Fill Process Sound Levels
Updated Menu Structure
Updated Symbols

* Basal-IQ® Technology. † Control-IQ® Technology.



Instructions for Using Your Replacement Pump



Before You Begin


Make sure you have your current pump settings written down or printed from the t:connect web application (My Devices > View Settings > Print). If you already have a t:connect account, please be sure to use your existing login credentials and do not create a new t:connect account.


Starting Your New Pump

  • Using the USB cable that came with your existing pump, connect your replacement pump to a power source. This will turn the pump on for initial set up.
  • Enter the settings from your existing pump into your replacement pump. For a refresher on how to enter your settings, watch this video or refer to your User Guide.
  • Fill and load a new cartridge
  • Resume insulin delivery

Connecting your Dexcom G6 CGM System


Whether you are continuing a current Dexcom G6 continuous glucose monitoring (CGM) sensor session or starting a new one with an existing transmitter you will need to disconnect your old pump from your transmitter and connect the new one by following the steps below:

  • Put your old pump into Storage Mode. In order to disconnect the old pump from your existing sensor session, it is important that you DO NOT stop the sensor session on your old pump. You can only have one pump connected to your Dexcom G6 CGM sensor session at a time.
  • Enter the transmitter ID into your replacement pump
  • Start the sensor on your replacement pump (Options > My CGM > Start Sensor)
  • Skip the sensor code on the replacement pump
  • Your replacement pump will then join the existing sensor session. It may take a few minutes for the CGM and replacement pump to connect and for numbers to populate on your t:slim X2™ insulin pump.

Linking to Your Account


After you program your replacement pump, it is important to link your new pump to your existing t:connect account so that you and your healthcare provider can continue to access and review your pump data. To link your replacement pump, watch this training video or reference our Support Page for detailed instructions.


Pairing to t:connect Mobile App


If you used the t:connect mobile app with your old pump:

  • Open the mobile app, go to Settings, and tap Unpair Pump
  • Then watch this helpful video or download the instructions to pair your new pump

If you did not use the t:connect mobile app with your old pump:

  • The t:connect mobile app serves as a discreet secondary display for your t:slim X2 insulin pump, so you can stay informed of your diabetes management from the convenience of your smartphone
  • To pair your new pump to the t:connect mobile app, watch this helpful video or download the pairing instructions

Returning Previous Pump

  • Ensure your new pump is up and running
  • Put your old pump into Storage Mode. If the On/Quick Bolus button on your old pump is not functioning, let the battery drain before sending it back to prevent the pump from beeping during shipment.
  • Place your old box securely in the white box that your replacement pump arrived in
  • Remove the Tandem sleeve from the outside of the box and seal the white box using the enclosed pre-paid UPS return shipping label
  • Drop the package off at any UPS store or UPS drop box location



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Product Return

To keep your account in good standing and avoid being charged for the full price of the replacement pump, please return the original pump within 10 days.



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Need Help?

If you have any questions regarding this process, please contact your healthcare provider or Tandem Customer Technical Support.