Huawei charging cable and Apple charging cable can not be common due to different ports, and Huawei charging head to Apple charging, only support the most basic 5V1A, the key to whether the charger can be mixed, is whether the charger and the phone support the same protocol.
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Each manufacturer has its own fast charge agreement, the same brand of chargers can be backward compatible with fast charge, different brands of chargers support different protocols, so it can not support fast charge. Of course, the charger generally supports the USB protocol, as long as the charger is marked with 5V1A or 5V2A.
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Basically all mobile phones support the USB charging protocol, and there is no problem with normal charging.
No, because they are not a platform and do not support interoperability