What is the RM number for the T-Mobile 640?

[HoosierDaddy]

The specs don't mention dual sims and it does have LTE. What is the RM model number for these and where can someone see the detailed specs.

Possibly related: someone posted about a 640 case for sale that mentioned it doesn't fit the T-Mobile 640. I don't know if that was a mistake or does the T-Mobile one have different dimensions or button size/location. Maybe like the 521s were slightly different than the 520s but this time only the RM was different and not the name.

 

[Shad0wguy]

Mine shows as RM-1073

 

[danny 2]

Rm 1073 1001

 

[DumDee2]

Does anybody know the product code number?

 

[itsnavsub]

For T-Mobile Lumia 640 LTE the product code is 059X0P7