Huge data consumption after latest OS update.

Can't confirm... maybe check your apn data, perhaps there is a wrong dns or something causing the consumption. Or a big attachment to a mail, which wasn't complete and tried all the time to Download? 1gb in 4-5hours is quite a massive consumption... Is the device also warming up?

do you notice battery consumption to be higher than normal as well?

Can you give some more information about which accounts you have on the device? Exchange / Google / Facebook / etc? If you disable the various synchronisation services for those accounts, do you notice a reduction in data usage? It's possible that you're hitting a bug where data is constantly resynced, causing the data usage. Alternatively, perhaps you a large number of photos which are being synced from Facebook? Finally, if you can provide any top/powertop information to show which processes are causing the downloads to occur, that would be extremely helpful. Thanks!

seems to be a tracker-service issue. at least it is on a couple of phones. think its a media info collection service. kill process with crest or lighthouse. probably fix fs on sd card

I am abroad currently so I do not use mobile internet connection. However, my phone keeps asking me to connect to the internet (when WiFi is off) several times a day without any particular app opened. It is a new issue since the update. My phone has battery drain and heat up a lot from time to time as well.

For example, I just used my Jolla quickly for 2 minutes, it asked me to connected to the internet four times or so. Very annoying when it pops up while playing games or typing SMS.