In the Mobile Push Personalization Options (see screenshot below), the system only offers a few standard options. However, I would like to know how I can populate this with my specific user fields. For example, in the contacts schema, I have a field called DeviceID. I would like send MobilePush using this.
But when I tried simply %%DeviceID%% it didn't work.
Is there a solution for this? Would an AMPScript be ok to use?