After updating to 8.1 live tiles are not updating for exmple WhatsApp,weather,news if I connect through mobile data...but works fine with WiFi...even I tried soft and hard reset but no changes..please help me out..
With a big update like 8.1, it is unfortunately often necessary to go into each of these apps settings, and changing them manually, unpinning them, repining them, the whole 9 yards. This will probably solve that issue. I would take a check at your mobile data settings, and also check battery saver. Both these settings can restrict background apps and live tile updates.
Hope I helped and good luck!