Basics15Using dual SIM or USIM cards (dual SIM models)If you insert two SIM or USIM cards, you can have two phone numbers or service providers fora single device.Activating SIM or USIM cardsOn the Home screen, tap Apps → Settings → SIM card manager. Select a SIM or USIM cardand tap the switch to activate it.Changing the display name and icon of SIM or USIM cardsOn the Home screen, tap Apps → Settings → SIM card manager. Select a SIM or USIM card,and tap Name or Icon. Set a display name and icon for each card.Switching between cardsWhen two SIM or USIM cards are activated, card selection icons appear on the dashboard ofthe notification panel. Open the notification panel and then select a card.Memory cardInstalling a memory cardYour device accepts memory cards with maximum capacities of 128 GB. Depending on thememory card manufacturer and type, some memory cards may not be compatible with yourdevice.• Some memory cards may not be fully compatible with the device. Using anincompatible card may damage the device or the memory card, or corrupt the datastored in it.• Use caution to insert the memory card right-side up.• The device supports the FAT and the exFAT file systems for memory cards. Wheninserting a card formatted in a different file system, the device asks to reformat thememory card.• Frequent writing and erasing of data shortens the lifespan of memory cards.• When inserting a memory card into the device, the memory card’s file directoryappears in the My Files → SD card folder.