Go to the Play Store & install the Canon PIXMA/MAXIFY Printing Solutions app. It works with my MX870.
A little less drastic than a reset, you could clear cache/data in the keyboard.
If you long press on the highlighted word/letter, it will give you...
I've been running a 64GB San Disk Ultra card for over a year now (since Verizon S4 release day) without any problems.
The last time I flew was in 1998. I had to prove my cell phone and pager both worked, way back then.
My 64G SanDisk works fine & no issues in over a year.
List the Baseband & Kernel versions. ROM build number may help as well.
Like others have said... install a known good antivirus app like AVG or Lookout & see if they find it.
I believe your first problem is related to S-voice. IIRC, S-voice can be activated by a double tap of the home button, so the phone has a delay to...
Your biggest drain while texting should be the screen being on constantly. Lowering your brightness would help the most.
There's also a piece of plastic covering the camera lens, if you didn't notice it already.
On my Verizon S4 you press & hold power & home buttons to get a screen shot.
I wouldn't worry about a one time event. Could've been a glitch that will never happen again.
Was this a 1 time thing or does it happen every day at the same time?
Lots of ROMs available over on XDA. No idea on the Gear, don't have one!
You missed the "& flashing ROMs" part. An MDK phone has much more potential than a phone with a newer baseband & Knox.
Go to Settings/More/About phone and see what baseband you have. If you like having root & flashing ROMs, you don't want to take the update anyway....
Just curious... what version of the S4 came with a car charger?
Since you've updated to 4.3, doing a Factory Data Reset will take you "back" to a clean/fresh install of 4.3, not 4.2. Once you update OTA, there's...
Try a reboot if you haven't already.
About the only thing you can do is a "Factory Data Reset". This will take your phone back to stock & erase all of your info/apps etc. You'll need to...
Separate names with a comma.