XSIM dual sim adapter acts like your secondary phone where you put your second SIM. Once you install SIMPlus app and enable Bluetooth in your original phone, you can start making / receiving calls via this second SIM number. You can use both SIM cards via your original phone. This will save you from transferring phone books and resources in your original phone to your secondary phone. You can use two SIM card numbers in one single phone.
QC3.0 is a charging protocol, it depends on the
charging adapter, not the cable. The XMAG magnetic charging cable supports max 2.1A charging current
and 12V charging voltage. In another words, the cable support QC3.0.