Bolus From Your Smartphone

Eviola, diagnosed 2012
Bolus Delivery

It’s time to start running through the items you need to update your pump so that you can bolus from your smart­phone.* This process will take at least 45 minutes.

What You Need to Get Started

  • t:connect account login credentials
    (email address and password)
  • t:slim X2 insulin pump
  • Supplies to load a new cartridge
  • Compatible smartphone

The feature set available to you within the mobile app is dependent on the model and operating system of your smartphone. Let's make sure your device is compatible.


Get Started


Log in to Your Account

Go to and sign in using your existing t:connect web application account credentials (email address and password).


Request Software Update

  • From the Home page, confirm there are no outstanding software update activities listed under the My Activities header and then select My Devices from the top navigation
  • Once the My Devices page has loaded, select the device you want to update and then select Update My Software
  • In the new window that opens, select Begin Update Process

Note: In order to be eligible for software updates, you must first complete the initial pump training on your Tandem insulin pump. If a message appears saying that pump training is not complete and you completed the initial training more than two weeks ago, please contact Clinical Training. We will review and respond to you within 1-2 business days.


Complete Required Training

The required training needed to bolus from your smartphone has been automatically assigned to you and will be listed under the My Activities section on the home page of the t:connect portal. This can at least 45 minutes.


To get started, follow the step-by-step instructions on this page or watch the helpful video below.

Personal Profiles

Open Activities?

If you have any software update activities open on the t:connect portal, you will need to complete them prior to updating for the bolus feature.


Prepare to Update

Once you’ve completed your online training, an email will be sent to you with instructions on next steps. Please make sure to:

  • Save the Update ID and Serial Number listed within the email
  • Have supplies ready, you might have to load a new cartridge before updating

Note: For more detailed information about loading a new cartridge on the t:slim X2 insulin pump, please see this article from our Support Center.

Note: This instructional email will come from If you do not receive it within two hours, please check your email's spam folder or another email that we may have on file for you.

Note: If you have an active continuous glucose monitoring (CGM) sensor session when you start the update process, you will need to restart the session again on your t:slim X2 insulin pump after the update is complete. The update process will NOT stop the sensor session, and you will not need to enter your transmitter ID again. When your pump asks if you have a sensor code, tap SKIP. Your pump should backfill any data missed during the update and you can continue to view your Dexcom G6 CGM data on the Dexcom mobile app during the update process.


Load a New Cartridge?

If your current pump cartridge has 80 units of insulin or more, then you only need to refill the tubing and cannula. You do not need to load a new cartridge.


Update Your Pump Software

Follow the prompts to update your t:slim X2 insulin pump using the Tandem Device Updater. The process should take fewer than 10 minutes to complete.


Update the t:connect Mobile App

Update to version 2.1.3 of the t:connect mobile app through Google Play or the App Store. Follow these detailed instructions and helpful video to pair the t:connect mobile app to your t:slim X2 insulin pump.

Note: If automatic app updates are enabled on your smartphone, the t:connect mobile app may have already been updated to the latest version.

Other Resource Materials

If you need additional help during the update process, please review our detailed update instructions.
 You can also download our
 Tips and Troubleshooting flyer for additional help with using the t:connect mobile app.


Download Updater

A new version of Tandem Device Updater was released in December 
of 2021. Please make sure you have the most 
recent version.

Enjoy the freedom to more easily manage your diabetes with the t:slim X2 insulin pump and t:connect mobile app.