The process of blocking mobile SIMs of non-filers is underway and so far SIMs of 230,000 non-filers have been blocked in a phase-wise. According to FBR sources, the data of non-filers was provided to various telecom companies. 76636 submitted income tax returns upon which their mobile SIMs are restored. So far, 230,000 SIMs of non-filers have been blocked in a …