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    How to choose between 4G cards and NB-IoT cards?
    Does your IoT SIM card support 2G, 3G, and 4G?
    Does the knowledge base only support maintenance in Chinese and English? Can other languages be added?
    OEM App marketing push notifications not received, what's the matter?
    How to customize the hot categories and common questions using the "Common Problems and Feedback UI Business Package"?
    How to query/export device information under OEM App registered users?
    How to insert a video when adding or editing knowledge in the IoT knowledge base?
    Why cannot I find user feedback tickets?
    When maintaining knowledge on the IoT platform, the error "Title Already Exists" appears. How should this be handled?
    How do I send custom messages to an OEM App?

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