Here is a deb package that simply executes this command (for people that don't want/have developer mode enabled and don't want to reboot). You may uninstall it afterward.

This is a permanent fix or i have to install it every time?

using the terminal and the deb package, restore settings (not clear device), neither work for me (not forget to reboot).

Btw, is there any different between that refresh command and refresh tool from N9 Refresh (from N9 Tweak)?

curious to change the sim card with another provider's sim card then back to original sim card, but can not do it now.

just guessing, it's not permanent because it's just package to execute a command that restarting something. maybe i'm wrong


edit: i forget that my problem can be fixed by connect my n9 to wifi. after that, my internet connection when using default apps back to normal again. thx.

im gladly want to share my solution here, after a year not having this issue, suddenly it come back today, so what im doing, first i backup my phone data, then restore it, the connection on internet 3g work flawless, you can try this method, although this is doesn't make any sense