Single SIM, No Case. TBH I don't know why Huawei (or other manufacturers bother with a Dual & Single SIM version of the same device. Cant be that much difference in the cost price of the hardware and especially when like the Mate 20 Pro the SIM tray is either Single SIM + NM or Dual Sim with the option of using a NM card instead of a SIM in slot 2 Applicable products： HUAWEI Mate Xs(dual sim card 8gb+512gb)，HUAWEI MatePad Pro(wi-fi 6gb+128gb、lte 8gb+512gb、10.8 inches wifi 8gb+256gb、10.8 inches lte 6gb+128gb、10.8 inches wifi only 6gb+128gb、10.8 inches wifi 6gb+128gb、10.8 inches wifi only 8gb+256gb、10.8 inches lte 8gb+256gb、wi-fi 8gb+256gb、lte 8gb+256gb)，PORSCHE DESIGN HUAWEI Mate 30 RS，HUAWEI Mate 30(dual sim Applicable products： HUAWEI P50 Pocket(dual sim card 8gb+256gb（bali-l29c）)，HUAWEI Mate Xs(dual sim card 8gb+512gb)，HUAWEI P30(single sim card 6gb+128gb、dual sim card 6gb+128gb、dual sim card 8gb+128gb)，HUAWEI Mate 20 Pro(dual sim card 6gb+128gb、single sim card 6gb+128gb)，PORSCHE DESIGN HUAWEI Mate 30 RS，HUAWEI Mate 30(dual sim card 8gb+256gb、dual sim card 8gb+128gb Cause: To prevent any important phone calls or SMS messages from being missed, the phone automatically powers on when being charged. When the phone is powered off and connected to a charger for charging: If the battery level is higher than 2%, the phone automatically powers on. If the battery level is lower than 2%, the phone automatically Important information before Buying the Mate 40 Pro 1. The Huawei Mate 40 Pro uses HMS (Huawei Mobile Service). GMS (Google Mobile Service) is not pre-installed when this phone is purchased. Any applications or services related to GMS may not work on this device. 2. Click on "Connections" or "Data". Click on "SIM card manager" or equivalent. Click on "Mobile Data". At this point, if “SIM 1” is selected on the screen, it means that you are using the SIM 1 card to access the Internet from your Huawei P40 Pro. If you want to use the SIM 2 card to access the Internet, click on "SIM 2" or the name of the Hi I have a second sim card which I have in the nano sd slot but seems that won't recognise or work as a second sim card. When used in the sim1 slot it is recognised but the second sim card not. Is there a way to run both sim cards at the same time or else what is the point of dual sim on the mate 20 Pro? Applicable products： HUAWEI P50 Pocket(dual sim card 8gb+256gb（bali-l29c）)，HUAWEI Mate Xs(dual sim card 8gb+512gb)，HUAWEI Mate 20 X(dual sim card 6gb+128gb)，HUAWEI P30(single sim card 6gb+128gb、dual sim card 6gb+128gb、dual sim card 8gb+128gb)，HUAWEI P30 Pro(single sim card 8gb+256gb、dual sim card 8gb+512gb、single sim card 6gb+128gb、dual sim card 6gb+128gb、dual sim j4PVKyz.

huawei mate 20 pro dual sim not working