Thank you for supporting Huawei device.
P8 lite supports dual sim cards, Card 1: Micro-SIM card, Card 2: Nano-SIM card. If you want to use SD card, you can only use one SIM card. You may try to contact your service operator whether your nano sim can be changed to a micro sim card.
Once again thank you for contacting Huawei device.
Best Regards,
Huawei Device Customer Care Team (3207)this is what they sent me.