If you want to take advantage of both SIM card slots and expandable storage, your options will be a little limited. While most phones with expandable microSD storage also offer dual-SIM, typically the SD card has to use that second SIM slot, forcing you to choose between storage and the SIM. If this is a priority for you, make sure to check reviews and specs carefully for phones that support two SIMs and a microSD card simultaneously - there are some out there - or look out for a combo of microSD and eSIM support.