Unfortunately, because I don't have the necessary tools to continue this teardown, I will let anyone with a Lumia 532 (Dual SIM or not) continue this guide and improve it.

Tip: If you don't have a Torx Screw Driver or bit, use a small flat screw driver. Align it in a position where you can spin the Torx screws safely. This chips the paint off the screws, though.