Originally Posted by dh4
Thanks for the reply but service mode is empty with or without sim card
Have you examined your APN and read all about what is valid for your handset?
Settings connections morenetworks mobile networks access point names
mine has ATT Phone lit up
---------- Post added at 10:45 PM ---------- Previous post was at 10:40 PM ----------
also I've taken apart my S4 and replaced the SIM/SD tray to no avail
tried tape on the sim chip to make it thicker
What did seem to work (still testing, so far so good) was peeling the phone apart again, all nine screws, and broken finger nails, and I unplugged the connector from the new SIM/SD tray and plugged it back in. This time I got a very positive click. Make sure and get your gigantic finger square over that tiny plug and after it's lined up do your best to press it straight down.
Seriously. I got a good click this last go around and it seems to be doing the trick. My S4 was run over in the street and it is only still alive because of otterbox.
---------- Post added at 10:50 PM ---------- Previous post was at 10:45 PM ----------
Remove the back cover, battery, SD card, and SIM chip.
Take out all nine screws with a tiny Philips head.
If you don't want to break finger nails use a guitar pick and peel the glass edge away from the chrome side bar all the way around.
Pop the plug off the tiny ribbon cable from your SIM/SD tray from it's place on the motherboard with your fingernail.
Plug it back in as square and straight down as possible.
Reassemble. Make sure all nine screws are all the way down as if some aren't screwed in all the way the back cover won't fit tight.