1. Add a device - Publish > Certificates > iOS
In your Apollo Apps backend, go to the menu Publish > Certificates > iOS.
In the list of authorized devices, click on "Add device" to add another device for testing.
You will be re-directed to the iOS submission process, specifically to step 6: Ad Hoc - Mobile Provision.
2. Enter the UDID of the new device
In order to obtain the UDID of the new device, please refer to this online help: iOS : How to get your UDID.
Then, go to your Apple Developer Account (https://developer.apple.com), go to Member Center, and open the Devices menu.
Click on the + sign on the top right of the page to add a new device.
Validate and save.
3. Edit the AdHoc provisioning profile of your app
Still in your Apple Developer Account, go to the Provisioning Profiles menu, and select the AdHoc provisioning profile of your application. Click on Edit.
Select the new device that you wish to register, and then click on Generate.
(Keep all other settings unchanged - both the App ID and the certificate!)
Once you've generated the new Provisioning Profile, click on Download to obtain it.
4. Replace the Mobile Provision - AdHoc in your backend
Return to step 6 of the process of the iOS submission process in your backend.
At step 6.7 of the process, delete the existing mobileprovision file, and replace it with the file that you've just created and downloaded from your Apple Developer Account.
Then, click on OK to proceed to the next step.
5. Last step: Re-build your app
All you need to still do now is build your app again by clicking on the button "Build my app".
Once it's ready, you will be able to install the AdHoc version on the new device as well.