SIM card phone numbers

[Guest rannoch]

I'm moving to PAYG O2 and my wife to PAYG Tesco. Both got C500s.

Problem is that both SIMS have in-build phone numbers - tesco flowers, bundles, directories, etc. which have been deleted.

My wife tends to sometimes switch her phone off, and when it's switched on again, the d**n nunbers re-appear.

Is there a permanent way to get rid of the SIM numbers.

Regards,

Rannoch