Doesn't that just lock your sim requiring you to enter a pin (to unlock the sim) before using your regular phone pin/print.
It doesn't do anything to protect your device in the event your sim is swapped for another one (after a theft), for instance.
Personally, i find the sim pin lock super inconvenient. If I lost my phone, I would much rather contact my provider and have them block it as I would need to order another (sim) anyway and start my number switch over again.
If it actually prevented another sim from being used (in the device) until the pin was entered, I would consider activating it.
(Maybe it does. To be honest, I've not used the feature for around 15 years), lol.
Thanks for the reply, All the best!