Carriers have this ability. They'll do it under certain circumstances. This isn't really one of them. It's extra work for the carrier and can result in innocen

Carriers have this ability. They'll do it under certain circumstances. This isn't really one of them. It's extra work for the carrier and can result in innocent people being denied service so they lean towards not banning IMEIs. Also it can be spoofed so it isn't a surefire way to ban these devices.