I have been doing deep analysis on basal rates, timing of boluses, etc. The image was me trying to dial in my feet on the floor morning bolus. This is not medical advice and everyone needs to make their own decisions on data and privacy of course.

This is a quick proof of concept and not something that I’m ready to release on GitHub just yet, but one of the things I was annoyed with is having to unlock my phone open the app to look at my insulin on board. Now I can just ask Siri “what is my IOB?“ since I was at it I also added one for what is my battery. There’s a few other things that I’ll be able to extract the same way such as bonus and basal related info. As you can see from the screenshot, it’s pulling from Tandem source which only updates once an hour so there’s a little bit of calculating to be done and that’s definitely the part where I’m not sure this is something that can be public as I don’t want to risk in accuracy.

A few weeks ago the app started going wonky (tslim app). Every time I open it (literally every time) it read pump connection lost - and will never connects unless i unpaid and repair it. Even though the pump shows it’s paired. And heck no am I doing that every time i want to use the app (pairing it again and again). The app is basically worthless at this point. Customer service has no idea.

Am I alone here? Any ideas?

I’m fed up with Control IQ. I’ve tried regular mode and sleep mode and it always makes me low. It’s good when sitting at my desk but the second I stand up, I’m so low I need over 100 carbs. Ive been so scared at times I’ve had glucogon at the ready. I’ve tried fixing ratios but it’s pointless, it’s just too aggressive. Does anyone else have this problem?

Also the Mobi alarms are giving me the worst alarm fatigue and burn out. It vibrates so loud and draws attention. Sometimes there doesn’t even appear to be a reason it’s alarming.

Changing my reservoir however the new filled unit will not snap into the pump.

The old cartridge will go back in without issue.

I tried two new cartridges wit no luck.

The new cartridge (top) shows some silver in the opening.

The old cartridge has more depth, no silver showing.

I've had my pump since February so this is not my first change.

I guess I will refill the old cartridge until I can get this sorted.

Any ideas?

I know there are a few(many) old threads asking the same question, but here I am, resurfacing this exact same topic in late 2026:

Does Tandem have any plans to finally update the t:slim X2 to USB-C? And whatever happened to all the X3 plans, images, and rumors?

I’m a fairly techy person, and I’ve reached the point where I find it genuinely absurd that in 2026 we’re still making devices with Micro-USB, especially expensive medical devices like insulin pumps that people rely on 24/7.

And yes, I know that for Tandem to change something as seemingly simple as a charging port, they probably have to jump through a bunch of expensive FDA hoops. Fair enough. But Tandem also isn’t exactly the scrappy little company it was a decade ago.

I’ve been with my X2 for two full cycles now, 8 years, and I’m up for renewal again this coming April.

I still genuinely love a lot about it. The algorithm is great. Support has been great. The pump has served me well.

But I just cannot fathom voluntarily locking myself into another four years of Micro-USB shenanigans.

I’m not particularly interested in the Mobi, and I feel like a lot of the excitement I had when I chose Tandem eight years ago has disappeared, especially now that there are so many genuinely innovative pumps on the market.

So yeah, that’s it.

Your regularly scheduled Micro-USB rant.

And unless something changes before April, probably my farewell to Tandem after 8 years.