**Please remove all widgets before the upgrade.**
If you lost data connection after the upgrade, you can resolve it by this:
1, Create a widget.
2,Select "Data Connection" in pop-up panel.
3,Turn the data connection on.( If you select the "APN" in switchpro settings panel, you should unselect it)
After that you can delete the widget and create a new one (Can be without data connection).
Sorry for the inconvenience, 1.8.1 has fixed this problem.