Before reflashing, have you checked in TOP? After the update contactsd was running wild on my X and the only way to keep it from clogging a whole cpu at 99% was to remove the contacts.db database and let it rebuild. A very old tjc question brought me to the solution Might be worth a try before reflash. Also note it can take some hours for the DB to fully recover. I thought the problem persistet even after killing the DB. But aftzer some hours the device finally settled down.