A few months ago, T-Mobile disabled its self-service option to make SIM changes. The reason behind this was because they were making some changes to improve the security of its SIM swapping procedure. This is to minimize the risk of fraud SIM swap attempts. While T-Mobile is not yet ready to reactivate its self-service SIM change feature, it has come up with a new SIM Protection feature.
As revealed by The T-Mo Report, the Un-carrier is getting ready to roll out this new feature. SIM Protection aims to secure the accounts of customers. Once SIM block protection has been enabled, any SIM change requests on the line will be prevented. The block can only be removed with a two-factor code sent to the legitimate customer. This way, an unauthorized SIM swap can be prevented.
To enable SIM protection, you can do so via the T-Mobile app, website, going to a store, or calling support.
Source: The T-Mo Report
