in the Software Recovery Tool, what is your 7-letter product code (059…)? No Windows computer or USB: The same code is printed on your phone (underneath the battery cover). That code determines your firmware variant which determines your current version. We can check together whether the update is available for your firmware variant already, only with that code.
I have an unbranded Lumia 640 purchased from Expansys. My phone is..
Lumia 640 LTE Dual SIM RM-1113
Product Code 059x1B3
OS 8.10.15127.138
Firm 02166.00000.15103.05001
Hardware 2.1.7.2
I'm on the Tmobile network and I haven't gotten the WIFI calling update. Any help would be appreciated.