FYI, T-Mobile US rolled out a free spam blocking feature at the start of the year, but you have to opt into it (presumably because of the risk of dropping valid

FYI, T-Mobile US rolled out a free spam blocking feature at the start of the year, but you have to opt into it (presumably because of the risk of dropping valid calls). I don't know if it applies to prepaid, unfortunately. If you log into your account it should be listed under features you can add to your line.