oneplus 6t memory card slot: samsung tablet sim card slot - Về Chúng Tôi. T Mobile Replacement Sim Card | eBay. RAM Price in Bangladesh | 8GB | 16GB.
If a memory card happens to be lodged in the SIM card
slot, take the device to a Samsung Service Centre to remove the memory card.
OnePlus' support/softwareupgrade page seems to be inaccessible at this moment, so look at this XDA thread for 6 and this one for 6T.
Credit Card Memory: Credit card memory is a proprietary self-contained DRAM memory module that plugs into a special slot for use in notebook computers.