Huawei devices fully support STK as required by 3GPP and GSM standards. However, Huawei’s implementation may vary slightly depending on:
Yes. On dual-SIM Huawei phones, each SIM has its own STK instance. You will see two entries in the app drawer (e.g., “SIM Toolkit 1” and “SIM Toolkit 2”) or a single app that lets you choose which SIM to use. sim toolkit huawei