Source URL: https://docs.surveycto.com/02-designing-forms/01-core-concepts/03u.field-types-subscriberid.html
Last updated: 2020-06-17
Field type: subscriberid
In the form designer, edit Form settings, then check the subscriberid meta-data field (if it isn't already).
subscriberid: record the subscriber ID associated with the device's SIM card, if any. This is an automatic, hidden field type: it is filled in automatically and never shows up in the survey's user interface.
In the spreadsheet form definition: