phones with 2 sim slots
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Both phones also have a microSD expansion slot which is shared with the second SIM slot on the tray.
Panasonic Cordless Phones - Panasonic KX-TW510 GSM (SIM SLOT) ...
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Best Samsung Phones with Dual SIM and Memory Card Slots
There were even phones with 5 SIM slots. This has led many major phone manufacturers like Samsung to develop at least dual SIM smartphones with a separate microSD card slot.