how can i fix my sim reader in my blackberry z3?

https://forums.crackberry.com/blackberry-z3-f418/blackberry-z3-sim-card-not-detected-why-1068435/

Have you confirmed the SIM itself is OK - put the SIM in another phone (either unlocked or on the same network) or putting another SIM in your phone (Any network if your phone is unlocked or same network if not)

http://support.blackberry.com/kb/#q=z3%20sim%20not%20detected

https://forums.crackberry.com/blackberry-z3-f418/why-my-blackberry-z3-not-detecting-any-sim-card-1051547/

https://forums.crackberry.com/blackberry-z10-f254/sim-card-not-detected-791158/

https://www.wikihow.com/Fix-a-Sim-Card-Error-on-a-Blackberry

https://mindaschool.blogspot.com/2017/10/blackberry-z3-simcard-not-detected-insert-sim-card-sim-way.htm - A bit cryptic though

affaagws
February 2018