Check your coverage area. Make sure that you're in an area with cellular network coverage. Then …
How to fix Samsung Galaxy Note 4 that can't connect to LTE May 19, 2018 [Fixed] How to Fix Cellular Data Not Working On Android Restart Your Smartphone. This type of problem mostly faced by new smartphone users and the … Cellular settings in Windows 10 - Windows Help Either way, you must have a data plan from a mobile operator to connect. Connect to a cellular data network for the first time. Select the Network icon ( or or ) on the lower right corner of the taskbar, and then select the cellular network icon that appears in the list. "Could not activate cellular data network" - Sprint Community
May 19, 2016
Fix Cellular Data Not Working without Data Loss. If nothing above seems to have worked so far, you … How to Fix Cellular Not Working on Apple Watch Issue
Could not activate cellular data network - Apple Community
How to Fix Cellular Missing from Network & Internet Settings Sep 20, 2019 [SOLVED] iPhone Could Not Activate Cellular Data Network