UPDATE... Improvements or lack thereof since Denim update on Mar 20th:
After owning my Lumia 830 (RM-985) for a couple of months I compiled a few cons and observations, was expecting it to be on par if not slightly better than my 1020/Ativ S but to date it hasn't proved so. Did a factory reset 12 days ago with not much in the way of improvements, faulty unit I don't know but definitely not alone as others are experiencing similar issues. All three of my Windows Phones are setup similarly in regards to apps, configuration and settings.
• Random freezing followed by a reboot while using apps, 7 reboots to date with no particular pattern other than app usage, have not encountered an idle reboot that I’m aware of.
Prior to the Denim update it had been a few weeks since last reboot occurred, close to 10 days now after updating to Denim and still stable (fingers crossed)(
• Capacitive buttons (“back” mostly) sometimes unresponsive, have iShieldz protector installed
Buttons "were" gradually getting better prior to Denim (touch sensitivity set to "HIGH"), after the update the back button has gotten considerably worse w/same screen protector installed and still set to high, definitely strange but at the same time annoying!!!
• Screen a tad too sensitive to the touch at times (set on high), in normal mode “back” button not sensitive enough
"Back" button worse w/no change in overall screen sensitivity, settings same
• Occasional screen lag or jitteriness while scrolling or when returning to home screen
No noticeable change
• Noticing “Resuming” is more prevalent on 830 compared to my 1020/Ativ S
Other than the camera pretty much the same
• Lumia camera on par speed-wise with my 1020 yet was expecting it to be slightly better, using the MS camera makes it comparable to my Ativ S
Much improved although can't say it's earth shattering, an improvement none the less
• Camera physical button overly sensitive, somewhat better w/gel case on but still find myself constantly launching camera
Same... Waiting for a new case to arrive and hopefully it will provide a little more resistance to alleviate unintentional camera launch
• Battery slow to charge, takes about 2-2.5 longer than my 1020 or Ativ S
Same
• Battery falls of rapidly from 100% charge by 5-8% within first 20-30min, seems to balances out after that
Improved by 1% WOOHOO!
• Battery drain under medium to heavy usage is 1.5-2 times faster than that of my 1020/Ativ S
Smidgen better yet not enough to be considered an improvement, keeping WiFi off helps of course
• Slow to shutdown, takes approx. 4-5 times longer compared to my other WPs, 1st 1020, 2nd Ativ S and lastly 830… Latter is the faster of the three on start-up but only by a smidgen
Vastly improved, may be superficial in that the "Goodbye" disappears faster but good enough for me
• With cellular data and Wifi on at the same time once in a blue moon it'll be slow or refuses to send emails or load certain app data (ie WC), turning off Wifi usually resolves, have had issues in the past sending text too but that hasn't occurred for months.
Same
• Occasional notification sound distortion when plugged in and charging
No reoccurrence for weeks prior to update and none after
Just to be clear, contrary to how the above sounds the phone is not a complete lemon yet comparing it to my Ativ S and L1020 it is definitely a step backwards, most of these issues are more annoyances than detrimental to its daily use and do find the overall "fluidity" of the L830 to be lacking, a stark contrast to my two other WPs.