Huawei Mobile Services - Get it on APK Mirror
Package Manager: App Details, Analyze & Backup - Get it on the Play Store
1) Uninstall any update Play Store has made to your theme app
2) Install Huawei Mobile Services
3) Install Package Manager: App Details, Analyze & Backup
4) Open the package manager you installed and click on the "Activities" tab, then in the search bar type in "hwid" it will show Huawei Mobile Services. Click it to expand its activities.
5) Scroll the list of activities until you see ""HUAWEI ID" click it and then choose launch
6) this will bring you to a log in page with a link to "register" click it to create an account. Create an account, use "UK" as your region, skip the phone/sms verification and it will use your email to verify.
7) Verify your account.
8) Scroll the list of activities until you see "Account Center" click it and then choose launch which will bring you to what should be an already logged in the account manager
9) Open the themes app it will ask you to agree to the terms then notify you its switching to the Local of your Huawei ID. Bam custom themes.
10) disable the themes app auto update in the play store as it will reset the app back to the North american CUST features.