@thedarktangent the same as your phone because : not change as an "unassociated sim" is illegal in nearly all our country, and in practice impossible to have as it always have record to link it to you (even if more or less difficult to find depending on how you buy it), and it's quite easy for any people that have this kind of network access to reassociate it to you after the fact.And even there the fact you enable vo WIFI will leak your original sim imsi via internet.Here the thing to know it's "impossible" to fix or protect yourself with client side fix only.