1. ColorOS 3.0 and above, after the SIM card is installed on the phone and connected to the data or WIFI network, the electronic card will be activated and registered, without manual operation, please rest assured. Registration can be viewed in Settings - Instructions - electronic card (ColorOS 3.1 has cancelled this entry, ColorOS 3.0 has cancelled some models).
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2, ColorOS 2.0, enter the tool-Service guide to view electronic card registration (ColorOS 2.1, enter the Settings - instructions, find the electronic card for registration and view.) .
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3, ColorOS 1.0 version, enter the tool-Service guide to view the electronic card registration