There are different variants od the 950 XL and one way to tell when buying (aside from the store listing and describing tthe phone correctly as single or dual SIM) is by the product RM number. The Dual SIM version is RM-1116 I believe and the Single SIM is RM-1085 I believe. I think the Single SIM version is usually labeled the International Version (which is funny to me because you'd think MS would make the international version dual, not single SIM). I also think that for the most part the Single SIM version come out of China shipments? I'm not certain about that. Anyway, you can find certain stores that sell the Single SIM version. Amazon has certain sellers that do and online store Expansys does too. You'd he to look around to find sites that sell the Single SIM version, but they're definitely out there.