New “Main” Device

This section is for Loopers who want to transfer their Loop to a new Device.

(Note: the device can be any compatible iPhone or iPod – for simplicity – we just say phone on this page)

The LoopDocs page (Updating) has the detailed information you need to update your old phone and be ready for your new phone. You should always be prepared to start with a blank Loop app (save all your settings and be prepared to switch to a new pod before using the new phone). But most people find all their settings (and even the pod session / Medtronic pump info) transferred successfully using these overall steps.

Important: Plan to keep your old phone until transfer is done.  You’ll continue Looping with old phone (perhaps just on WiFi) until ready to transfer the Looping activity. Even if you’re turning in the old phone for credit, ask to keep it for a week before turning it in.  Most places allow this.

WARNING: If you are using a different Apple Developers ID for this build, then your settings will not transfer and you will wind up with 2 Loop apps on your old phone. (You can switch to using the new app, and delete old app before setting up a new phone, or do it just on the new phone)

Prepare for the New Device

Update your old phone first using Loopdocs (Updating)

  • Why should I do this?
    • The first thing you do with the new phone is update it to the latest iOS so you can do the transfer all of your phone settings (using the standard Apple method)
    • This way you’ve worked out the kinks on a new build with that iOS using your old phone
  • Update your old phone to the latest iOS
  • Update your Mac to the appropriate version of the Mac OS
  • Update your Xcode to the appropriate version for the Mac OS and iPhone OS
  • Download the desired version of Loop
  • Build Loop on your old phone – make sure that you only have one Loop app on phone when done
    • If there is more than one Loop app then you probably built using a different Apple Developer’s ID
    • This means that you will have to set up the new Loop app as if new on one of the phones – plan accordingly

Set up New Device

Do the standard Apple transfer from old phone to new phone, but keep looping with old phone

Build Loop on the New Phone:

  • Open Xcode – use the same build as you used for the Old Phone
  • Plug in New Phone to Mac (trust phone/computer) and hit build
  • Build Loop on New Phone

Transfer Succeeded

    Success: It worked all your settings are there – Congratulations – only one more step.

    IMPORTANT – check every setting – make sure all the basal, ISF, CR, and ranges are correct. 

    Loop Built but Transfer did not succeed

    Go to LoopDocs (Setup) for information on how to add settings and CGM and pump.

    Complete transition to new Device

    You have to turn things off on old phone because only one phone can connect to Dexcom or Rileylink at a time.

    Old Phone

    • Go to Loop on old phone and slide the slider for Rileylink to off 
      • DO NOT DELETE PUMP if on Pods – that cannot be reversed and you might need to switch back to old phone
    • Go into phone Settings -> Bluetooth and forget the Dexcom
    • Turn off bluetooth on old phone

    New Phone

    • Make sure new phone has bluetooth turned on
    • Make sure Rileylink is near new phone – it should connect automatically
    • Delete the CGM in Loop (so you can connect Dexcom)
    • In Dexcom app, you can keep using your current session.
      • pair new transmitter (it’s not really new, enter number)
      • start new sensor (it’s not really new, enter no code)
      • within 5 to 10 minutes, Dexcom app should read current session and keep going
    • In Loop app, add CGM with current transmitter
    • Wait until you have a green loop (may take 15 minutes)

    Old Phone

    • In Loop app, delete pump and CGM

    You can either keep the Old Phone as a backup or reset it and turn it in for credit or give to some deserving individual.

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