I recently got a new Tandem T-Slim to replace my old one. I use the t_connect app on my iPhone. It’s convenient, and I like being able to bolus from my phone. However, about 50% of the time when I open the app it has lost connection with my pump. If I can’t get it to connect I have to pull out my pump for access. Annoying, but not a really big deal. But if this happens with a Mobi, I think there is no way to use the pump, or see the cgm numbers? Is this correct? Does the Mobi have a better connection rate with whatever is receiving the data? I didn’t get the Mobil for other reasons (I use a lot of insulin, and it won’t last me the full three days) but this is a more serious problem.
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I don’t have much trouble with that, just once an a while. My work around is to open Dexcom app usually the BG reading is available. Go back to Tandem all insert BG and bolus as usual.
I always have the pump on the same side as Dexcom and the pump face must never face the body. The Bluetooth signal radiates from the screen and will never see the sensor.
Or get current BG from my watch.
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I had signal loss alarms just now because my cat, Manny, was laying on me and the pump. Decom never lost connection. 
I do see that the pump is disconnected frequently, but it’s fully justified. Since the iPhone isn’t my primary device, I’m often out of Bluetooth range of it.
It’s a very simple fix, though. Just have to swipe down from the top of the screen, which forces the app to refresh. It reconnects instantly.
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I wish. My Tandem app also looses connection too frequently.
CR
Occasionally mine will refresh fairly promptly, but not always.
CR
I can’t compare the T:connect and Mobi apps directly, because I’ve used them on two different operating systems. Android for T:connect and IOS for Mobi. But so far the Mobi app has worked flawlessly for me. There are a few design choices I don’t like, but it’s very stable and works. I’ve never had to wait for it to reconnect to the pump. It’s been instantaneous every time I swipe down.
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2 comments/questions regarding this.
- since dexcom lasts 10 days and pump cartridge is about 3 how do you keep your pump on the same side always? I usually have mine in my left pocket half when infusion site is on my left and in my right pocket when site is on my right. I don’t like running the tubing halfway around my body to put it in the other pocket…I definitely notice more drops when the devices are on opposite sides.
- I don’t understand why the Bluetooth radiates from the face. I’ve always kept phones or pumps screen side toward my body to help protect them from scratches. I actually hate having it face the opposite way.
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I use a little too much Insulin to really consider the Mobi, but I had the same concerns when I upgraded my pump a while back. I don’t think I like not being able to control the pump directly if necessary.
Hmmm, well I guess you can’t strictly get a 3-day rotation to line up with a 10-day rotation, but you can fudge it. Change a site a day early or a day late once in a while (or 6-12 hours early or late more frequently).
I personally do sometimes have the tubing run across my body for 12-24 hours every once in a while. I also use steel infusion sets (change every two days technically) so not the exact same problem.
As long as you use tubing sets that are longer, you can move the pump from side to side to correspond with the location of your sensor. The actual insertion site of the tubing set doesn’t matter. But I suppose if you use the 5" tubing that will be an issue.
If you orient your pump to the back and if your sensor is on the back of you arm, it won’t matter which side it is on.
I go from left to right every 3 days, making sure my pump faces to the back in some way. I never wear either one on my belly so I suppose you could just do that both facing forward.
If your ap ever loses connection , just go to Bluetooth turn it off and back on. And it will refresh your connection pretty fast. Within a min.
But the mobi ap is much better about not losing connection than the old t connect.