Mobile Data problems with Apps and Internet access.

[AC Question]

Since a few days I have some trouble with Internet access. Internet access and speed is only stable and fast when there is Wifi. When I am using Mobile Data, Internet has lack of speed and some apps do not work at all. Is there an issue known with the nexus 4 with its mobile antenna in general or may there a problem with my antenna in particular.

Android 5.1.1. - Up to date

Any ideas?

 

[belodion]

Is your mobile signal good, as indicated in the status bar for example?