Tandem t:connect Mobile App Issue

More than 200 people with diabetes were injured when their insulin pumps shut down unexpectedly due to a problem with a connected mobile app, the US Food and Drug Administration said Wednesday.

Version 2.7 of the t:connect Apple iOS app – used with the t:slim X2 insulin pump with Control-IQ – has been recalled due to a software issue that causes the app to crash and relaunch. This cycle drains the pump battery, causing it to shut down sooner than expected and suspend insulin delivery.

The issue “may result in hyperglycemia or even diabetic ketoacidosis, which can be a life-threatening condition due to high blood sugars and lack of insulin,” the FDA said.

The agency said there have been 224 reported injuries as of April 15. No deaths have been reported.


The app was distributed from February 12 through March 13, and more than 85,000 have been recalled, the agency said in its announcement of the Class I recall – the most serious type of recall.

On March 26, Tandem Diabetes Care Inc. sent affected customers a device correction letter requesting that users update the mobile app to version 2.7.1 or later. In its letter, Tandem said people should continue to use the pumps and update the app. Users should pay attention to system alerts, including monitoring the pump’s battery level, and ensure that it’s fully charged or near full before going to sleep.

Customers in the United States can contact the Tandem Diabetes Care Technical Support Team at (877) 801-6901 for more information.


Thank you so much for sharing this. Please note: a few days ago I noticed that the battery on my tslim had drained very quickly. This only happened on 1 day and I noticed it and charged the pump without any issues. However, my pump is running version 2.7.1. Looks like we all need to pay close attention to the power levels on our tslim pumps.

I agree that this needs to be reported and needs to be addressed by Tandem ASAP!
I also think that we need to consider harms / benefits. What is the magnitude of the harm that this software glitch has caused? What benefits do we see from semi-automated and regulated insulin delivery with CGM integration?
We become over-reliant on technology if we forget that ultimately it is we who need to be in charge. The pump will alarm before it shuts down. Did the patients not hear it? The phone, or receiver, will alarm when the glucose exceeds preset limits. Did this go unnoticed?
We all share responsibility for our health and should not expect perfection from our technology, only competence.


Which is one of the (many) reasons I use just my pump as the receiver. I have yet to leave my pump at a restaurant table etc…

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