S8 update causes my phone to lose network connection

[Android Central Question]

I let my phone update a few days ago and ever since I've lost my network connection several times with a message "No SIM card"!! I've had to completely turn my phone off and back on. I've been in the middle of phone calls when this happened - NOT acceptable, can I undo this update?

 

[B. Diddy]

Welcome to Android Central! Try wiping the cache partition, which can be helpful after system updates: https://support.t-mobile.com/docs/DOC-34311