New Troubleshooting: Network problem

Oct 3, 2011
Everytime my phone reconnects to a mobile network I get a popup ad, not the ones in the notification pull down menu, but one that pops up as a system popup saying: "轻松由我神州行品牌带给您轻松,自由和实惠的生活享受". So i know it's an advertisement, but I can't determine from where it's coming from. And each time this pops up, my mobile network goes into emergency calls only or no service, in which I have to put it on airplane mode and take it off airplane mode to restore the connection.

Xiami Mi 2
Running android version: 4.1.1 JrO03L
Miui Version: MIUI-4.4.18