Lumia 636, 638 in works.
Lumia 636 is a single-SIM phone, the Lumia 638 might be its dual-SIM counterpart or a version of the phone with 1GB of RAM
source: gsmarena
Nokia Lumia 636 with TD-LTE gets China authroties' approval - GSMArena.com news
Lumia 636 is a single-SIM phone, the Lumia 638 might be its dual-SIM counterpart or a version of the phone with 1GB of RAM
source: gsmarena
Nokia Lumia 636 with TD-LTE gets China authroties' approval - GSMArena.com news