Push notifications and some live tiles are
completely busted on my Verizon HTC 8X...I have soft reset multiple times, tried turning individual apps notifications on and off, turning them on and off in the Battery Saver, etc. Issue happens for me on both Wi-Fi and cellular data...there is no difference. Finally, last night, I did a hard reset and wiped the phone clean and started over.
(Good news is that the WP8.1 restore system is EVEN BETTER than WP8 in my opinion, and that one was already pretty good.)
So even after the hard reset and all other suggestions I've seen in other threads, notifications just plain don't work for me. Could be the phone, could be the signal strength (doubt it though since it's a low LTE signal, but I still have 4.0Mbps in my office on LTE with 2 bars), could be Verizon...just don't know. Strange thing is I even have e-mail sync set to check every 30 minutes, and it will go for hours with no update!! But when I force a sync, tons of e-mail will come through which should have been pushed. Before the hard reset I was at least getting Twitter notifications for those I've turned on to notify me through the official Twitter app. After the hard reset, I don't even get those now.
My last ditch hope is to wait for the official version (YES, I KNOW THIS IS A PREVIEW AND A DEVELOPER VERSION) and/or further updates to the OS as part of the preview. In the meantime, the only other thing I can think to try is to change my date/time from automatic to manual, just in case that might make a difference. I may try turning off Data Sense too, to see if there is a bug there..one thing at a time though
Sound off if you have had any success and/or trouble with push notifications....I'm curious to see others experiences so far...