Hi, The error: MutateMembersError.INCOMPATIBLE_UPLOAD_KEY_TYPE you get is because a userlist can be uploaded with only one type of data and once uploaded, it will not accept any other ID types <https://developers.google.com/adwords/api/docs/reference/v201802/AdwordsUserListService.Member>. Therefore, you would need to create a userlist and upload only a mobileid. In addition, when you use AdWords v201802, the new appId field is required <https://developers.google.com/adwords/api/docs/reference/release-notes/v201802#remarketing>. Also, please note that it needs to be a valid mobile id in general IDFA format, otherwise you will get the MutateMembersError.INVALID_MOBILE_ID_FORMAT. By adId, did you mean AddressInfo? If you have any issues on that front, could you please elaborate citing specific examples and provide SOAP logs, so that I can troubleshoot further? You may opt to *reply privately to author*.
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