The main problem I often face is in the selection of mobile devices which is defaulted to only one and I want to select more but your system won’t let me.
What can one do to be able to choose more mobile phone devices?
If one stays, the default one, can’t everyone else who has other devices download it???
Are you referring to selecting non-Amazon devices during the submission process? If you aren’t able to select any other devices, it may be because there are incompatibilities in your manifest. Check out the screenshot for an example: