No Service after the update
After updating the phone OS to iOS 13.4.1 I am getting no service. Before that I was working perfectly fine. Meanwhile I have performed hard reset and resetting the network setting also still nothing is working.
In the mobile data section the error shown is "An Update is needed to use the data on this mobile". Also in the About section of the phone the Network provider names is mentioned in Network Providers.
Please provide steps to downgrade to the previous version
iPhone 7, iOS 13