I'm unlocked but use a different carrier, can I use World Mobile at the same time?
Yes! If your phone supports dual SIM capability either from two eSIMs or one physical SIM and one eSIM and the device is unlocked from the prior carrier provider.
Your device will allow you to set specifics on which network and number you'd like to keep as your primary one for voice calling and SMS (texting). You can also specify if you'd like data services to pick between either your existing carrier and World Mobile, whomever has the best service availability. This functionality may be device and software specific, so be sure to check with your device manufacturer ahead of time.