When I was on 4.3 - My data dropped out and took around 10-20mins to show up again, I just put it down to my network being silly, since I've been on 4.4.2 not had any data/signal issues.
When I was on 4.3 - My data dropped out and took around 10-20mins to show up again, I just put it down to my network being silly, since I've been on 4.4.2 not had any data/signal issues.