Is it posssible to download a previous version (iOS 14) until this gets resolved by Apple!

Looks like someone crapped the bed...I need help to get my iPhone 6s Plus working as designed again (WiFi works great at home...phone has NO data connectivity whatsoever since the "upgrade" to iOS 14.1 HELP!!!!
Ditto. Looks like updated last night while I was sleeping and now nothing works this morning. Amazon music crashes, about 70% of apps don’t work. *** Apple?
Is it posssible to download a previous version (iOS 14) until this gets resolved by Apple!
 
 
Q