As Microsoft has closed down almost every Nokia related service and sites, it is now very difficult to get software files of Nokia phones. I have provided a single working download link to download Latest and old firmware files for the Lumia 435 the Dual Sim .You just have to click on the firmware Folder link below and right click on your desired file then click download.
Before you proceed any further please check out this blog post i created on installing and downloading of Nokia and Lumia phones Firmwares Here.
Downloading and Flashing a Firmware can help you to reset and recover your phone software at anywhere and anytime without a need for an internet connection.This can really help you if your phone is not responding, frozen, experiencing software related or software update problems.
You can also request for more Lumia 435 firmwares with product codes by commenting on this post.
Model: Microsoft Lumia 435 Dual Sim
Product RM: RM-1069
059W8Q8: RM-1069 VAR APAC VN CV
059W8W4: RM-1069 VAR APAC ID ERA
059W8W5: RM-1069 VAR APAC ID PAR
059W8W6: RM-1069 VAR APAC ID TRI
059W8Z9: RM-1069 VAR, EURO FR CV
059W909: RM-1069 VAR IMEA IN CV
059W977: RM-1069 VAR IMEA 4K CV
059W978: RM-1069 VAR IMEA PK CV
059W979: RM-1069 VAR IMEA 4Y CV
059W9F2: RM-1069 VAR IMEA 7P CV
059W9H0: RM-1069 VAR, EURO RO TELEKOM
059W9K2 :RM-1069 VAR IMEA 6K CV
059W9L6: RM-1069 VAR IMEA 1E ORANGE
059W9P8: RM-1069 VAR, EURO 6A CV
059W9Q6: RM-1069 VAR IMEA 3T CV
059X006: RM-1069 VAR IMEA 9L CV
059X0F6: RM-1069 VAR 7L CV, EURO
059X0G6: RM-1069, EURO 9T CV VAR
059X0K2: RM-1069, EURO the PL CV VAR
059X0Q5: RM-1069 VAR EURO 7F CV
Software Version: 02055.00000.14511.2200X