T-Mobile will soon allow its mobile network customers to access live audio language translation during any voice call by simply pressing *87* during the call. The AI-powered feature can translate over 50 different languages and auto-detects the language(s) being spoken. The person(s) on the other end does not need to be a T-Mobile customer and could even be a landline. As a purely network-based feature, it works with any phone and does not require any software on the phone. The feature will be available to T-Mobile customers roaming internationally in "select countries on partner networks with VoLTE enabled." Current T-Mobile customers can register now for a chance to beta-test the feature "this spring". The beta test will be free, but "commercial launch later this year" may carry a fee.