How Can I Completely Disable SMS and Calling on My Son’s Samsung S21?

One idea is to set up a VoIP or free calling service instead of traditional SMS. You can also try uninstalling any third-party texting and calling apps and disabling the Samsung messaging features. Here are some links that could be useful: [Block Incoming Calls](https://www.androidcentral.com/how-block-all-incoming-calls), [Disable SMS on Android](https://www.pvacodes.com/blog/how-to-enable-or-disable-sms-messages-on-your-android-device), [Stop Receiving Texts](https://www.airdroid.com/parent-control/stop-receiving-text-messages-without-blocking/). Glad to help!

Consider using parental controls! Alternatively, you could get a regular plan and restrict calls to only certain numbers. Also, you can't disable emergency services, which is important for safety. Android provides tools for parents to maintain control over settings, so your son can use his device responsibly until he's older.

You might want to check with your mobile provider first. Some providers offer options to manage your account like restricting calls or texts. Also, keep in mind that there are apps like Google Phone that may help but preventing access to emergency services is a legal issue, so total disabling isn't really an option. Just keep that in mind!

Disabling SMS and calls isn’t possible since it could block emergency numbers like 911. Instead, teach your son how to use the phone responsibly! Just so you know, you won't be charged for incoming texts or calls; those fees apply only to outgoing messages.