Does Phone (1) have dual 4G modes? October 26, 2022 10:47 Updated 1. Both SIM cards one and two support 4G networks. However, SIM cards 1 and 2 cannot use 4G network simultaneously.When two SIM cards are detected, a prompt will pop up and allow you to set the SIM card to use the data network Related articles How does dual SIM work? What is the Find My Phone feature? Does the phone need to be restarted every day? Will Phone (1) support dual SIM? Will replacing the SIM card affect the Find My Phone feature?