Post [Q] Problem: Unstable data connection after update

I updated my Note 3 about a month ago to 4.4.2 and whenever I'm using 3G (H,H+) my signal disconnects. This doesn't happen when I'm on 4G, and I use 3G most of the time. Plus I don't think it's hardware related becuase I didn't have this issue before the update. I can't wait for the bug fixes from the next update, the issue is really giving me a hard time. Any solutions? (The service center just reflashed the update but that didn't help)