If I understand the specs correctly WC reported wrong information in the articles about 640XL being a Dual-SIM LTE capable. Microsoft mobile website does not mention that.
Never mind found the correct link. It seems there is a dual SIM version. Microsoft Lumia 640 XL LTE Dual SIM Specifications - Microsoft - Global
I have a Dual Sim 640XL. I have not tried two LTE sims at once but I have had my LTE data sim in port 1 and got LTE and switched it to port 2 and got LTE also. I currently don't have a voice plan with LTE. I use a pay as you go calling and texting only sim and a data only sim. So I can not test if both ports can have 3G/4G/LTE at the same time.
I bought the Dual SIM LTE version from Expansys USA, it's listed at just 640 XL, but I received a Dual SIM LTE. It gets LTE for AT&T in New Jersey. You can select date for either SIM, and I have an LTE SIM in SIM 2. Both are not concurrent LTE, but when switched, I get LTE on SIM 2 and the other just says "G".
Oh man, wish I would have known Expansys 640XLs were dual sim. I paid $304 off ebay. It came from HK in 2 days though. Oh well, it's still a nice phone.
Looks like Lumia 640 XL LTE will not be released before June 2015..I asked why, MC France had no idea
Looks like Lumia 640 XL LTE will not be released before June 2015..I asked why, MC France had no idea