Insert the guitar picks and slide it to cut the adhesive underneath.
Remove back cover. The back cover is glass, so only use a sucker if you're experienced. otherwise use a small blade to lift off the back while the glue is soft.
Release rear camera connector, front camera connector, audio jack flex connector and main flex connector on the motherboard and remove the screws there.
short question was that a normal xperia z5 or the dual SIM Version because it looks like the SIM reader is long enough to Support two SIM cards. It would be nice if you could check if there are two SIM ports here.