Not too long ago, Ericsson was waxing lyrical about the tremendous growth in its BSS business, and now the Swedish vendor has initiated a $700 million write down of the division as part of a restructuring process. Specifically, Ericsson says its new Revenue Manager product was a complete flop and had to be written off in order to focus on its Ericsson Digital BSS platform, which will pave the way to ending BSS losses – along more with more job cuts – to hit targets in the Digital Services segment by 2020. T-Mobile US continues to break records. The uncarrier added a personal best 2.4 million subscribers in Q4, bringing its 2018 total to 7 million net gains – to…