Marco Giesing , via OnePlus 7T , Oct 16, 2021 : After recently updating to OOS 18.104.22.168.HD65BA I have encountered random service drops several times per hour. My service will just go to no service for anywhere between 10 seconds to 1 minute or so. I did not change any settings, especially not regarding the simcard/network operations or anything. Also cleaned the simcard slot with compressed air but that did not do the trick. Obviously also made sure the simcard itself was clean. Tested the simcard on a different device aswell for about 3 hours. On that device the simcard worked correctly and I did not experience any service drops. While typing this thread the service already dropped once, again. Hope anyone got a fix!