Since upgrading to ios14, I have been having no cellular/disconnecting cellular services. I have both physical and esim and it happens to both. I currently have the latest ios14.2 and still the issues persist. Phone: iphone 11 Pro Max (model MWHA2LL/A) Carrier SIM and eSIM: 3 different companies from different companies (all have issues) Things I have done: Change to new sim - did not help Reset network settings - did not help 3G only - did not help No VPN is installed - nothing to delete update to newest profile - did not help talk to apple support - was friendly but did not solve issue talked to apple support and sent diagnostics including 30 min network analysis - no resolution talked to network carrier - friendly but not their issue turn on/off roaming - did not help manual selection of carrier - did not help I strongly believe it is an iOS 14 issue. Please get it fixed. I am losing patience. ios13 did not have any issues at all.