In Android before 2018-04-05 or earlier security patch level on Qualcomm Snapdragon Mobile MDM9635M, MDM9645, MDM9650, MDM9655, SD 210/SD 212/SD 205, SD 400, SD 410/12, SD 425, SD 427, SD 430, SD 435, SD 450, SD 615/16/SD 415, SD 617, SD 625, SD 650/52, SD 810, SDM630, SDM636, SDM660, and Snapdragon_High_Med_2016, stopping of the DTR prematurely causes micro kernel to be stuck. This can be triggered with a timing change injectable in RACH procedure.