[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] djuka007:
So, here's an output from CDMA workshop where everything labeled "inactive item" is not working.

Failed to read Hybrid Preference - Value out of range
Failed to read RUIM verification #1 - Inactive item
Failed to read RUIM verification #2 - Inactive item
Failed to read FSC - Security password is required
Failed to read OTKSL - Security password is required
Failed to read CDMA SID/NID pairs - Inactive item
Failed to read RRC Version - Value out of range
Failed to read Bluetooth address - Parameter bad
Failed to read Remote initiate Device0 IPCP/IPV6CP - Inactive item
Failed to read Remote initiate Device1 IPCP/IPV6CP - Inactive item
Failed to read Remote initiate Device2 IPCP/IPV6CP - Inactive item
Failed to read PDSN as proxy DNS flag - Inactive item
Failed to read IPv6 Primary DNS - Inactive item
Failed to read IPv6 Secondary DNS - Inactive item
Failed to read Failover config - Inactive item
Failed to read Interface IDentifier - Inactive item
Failed to read Neighbor discovery config - Inactive item
Failed to read AMPS SID lockout - Inactive item
Failed to read AMPS SID Acquire - Inactive item
Failed to read AMPS Last SID - Inactive item
Failed to read AMPS LOCAID - Inactive item
Failed to read AMPS 1st paging channel - Inactive item
Failed to read AMPS Powerup registration flag - Inactive item
Failed to read AMPS Preferred System - Inactive item
Failed to read AMPS Registration - Inactive item
Failed to read GSM A5 algorithms byte - Inactive item
Failed to read UE RAT - Inactive item
Failed to read GSM UE op class - Inactive item
Failed to read UMTS UE op class - Inactive item
Failed to read UE SMS value - Inactive item
Failed to read UE SM value - Inactive item
Failed to read Earpiece volume - Inactive item
Failed to read Speaker volume - Inactive item
Failed to read Key beep - Inactive item
Failed to read Speaker beep - Inactive item
Failed to read Ringer volume - Inactive item
Failed to read Speaker ringer - Inactive item
Failed to read Backlight - Inactive item
Failed to read Show time flag - Inactive item
Failed to read Handset level - Inactive item
Failed to read Headset level - Inactive item
Failed to read HFK level - Inactive item
Failed to read Play mode - Inactive item
Failed to read Repeat mode flag - Inactive item
Failed to read Storage device - Inactive item
Failed to read Multimedia level - Inactive item
Failed to read Beep level - Inactive item
Failed to read Volume level - Inactive item
Failed to read Ringer file - Inactive item
Failed to read Beep length - Inactive item
Failed to read Auto redial - Inactive item
Failed to read Vibrate mode - Inactive item
Failed to read Roam ringer - Inactive item
Failed to read SMS auto delete flag - Inactive item
Failed to read SMS auto delete flag - Inactive item
Failed to read SMS time display - Inactive item
Failed to read Service area alert - Inactive item
Failed to read Call fade alert - Inactive item
Failed to read Minute alert - Inactive item
Failed to read Message volume - Inactive item
Failed to read Speaker message volume - Inactive item
Failed to read Full pref mode flag - Inactive item
Failed to read HFK voice recognition flag - Inactive item
Failed to read HFK voice answer flag - Inactive item
Failed to read One touch dial flag - Inactive item
Failed to read SMS UMTS routing - Parameter bad
Failed to read SMS VM number - Inactive item
Failed to read Call timer G - Inactive item
Failed to read Life timer G - Inactive item
Failed to read Life count - Inactive item
Failed to read Air timer - Inactive item
Failed to read Air count - Inactive item
Failed to read Roam timer - Inactive item
Failed to read Roam count - Inactive item
Failed to read Rental count - Parameter bad
Failed to read Rental timer enabled flag - Parameter bad
Failed to read Rental timer increment - Parameter bad
Failed to read Rental timer - Parameter bad
Failed to read Turn off count - Inactive item
Failed to read AMPS reg count - Inactive item
Failed to read GPS allowed flag - Inactive item
Failed to read PDE transport - Inactive item
Failed to read Position calculation - Inactive item
Failed to read gpsOne privacy - Inactive item
Failed to read Network access control - Inactive item
Failed to read Cell based - Inactive item
Failed to read Teleservice ID - Inactive item
Failed to read USB data device enumeration - Inactive item
Failed to read WWAN over WiFi flag - Inactive item
Failed to read Multi auth flag - Inactive item
Failed to read DPD enabled flag - Inactive item
Failed to read IKE soft rekey time - Inactive item
Failed to read IKE hard rekey time - Inactive item
Failed to read Child sa soft rekey time - Inactive item
Failed to read Child sa hard rekey time - Inactive item
Failed to read Child sa soft rekey bytes - Inactive item
Failed to read Child sa hard rekey bytes - Inactive item
Failed to read NAT keepalive interval - Inactive item
Failed to read Local breakout - Inactive item
Failed to read Auth mode - Inactive item
Failed to read IKE DH mode - Inactive item
Failed to read PDIF address - Inactive item
Failed to read IKE retrans interval - Inactive item
Failed to read IKE max retrans - Inactive item
Failed to read IKEv2 IP config mask - Inactive item
Failed to read DHCP IP config mask - Inactive item
Failed to read Child sa encryption - Inactive item
Failed to read IKE sa encryption - Inactive item
Failed to read IKE sa prf - Inactive item
Failed to read Child sa auth mask - Inactive item
Failed to read IKE sa auth mask - Inactive item
Failed to read DPD time - Inactive item
Failed to read Operator ID - Inactive item
Failed to read Realm - Inactive item
Failed to read PDIF PQDN - Inactive item
Failed to read WLAN MAC address - Inactive item
Failed to read eHRPD IMSI - Inactive item
Failed to read Operator variant alg - Inactive item
Failed to read PPP EAP shared secret - Inactive item
Failed to read PPP EAP user ID - Inactive item
Failed to read eHRPD enabled flag - Inactive item
Read EVDO page... Skipped (This page is available in registered version only)

As you can see, most of the stuff. I have no sound, camera is not working, microphone, speaker, you name it.

Now to the story of how I got here. I bought my phone on eBay from a reseller, as used but in excellent condition (which I confirm).

I couldn't unlock it directly (from Sprint) since I needed a phone number and a pin code of the previous owner *which I didn't have and reseller couldn't/wouldn't give it to me*.

Still unlocking was easy enough and I was happy to bring my phone to Europe and use it with a SIM card without problems.

Since I despise anything related to TouchWiz, I was more than happy to install a custom ROM (Resurrection Remix 6.0.1) and everything was working fine till the last update.

Then I've lost the sound, couldn't make the phone calls and I thought that returning to a stock ROM would make things right (L720SPTFNG2, the one I got it with).

But this didn't help at all, since I can't even do a first step into figuring out what's wrong which is to have the device activated (have no idea if half of these things don't work because the device isn't activated).

Of course, I don't have access to Sprint here so I read a bit on how to do this and a post by AlpineMan gave me all the outside informations but I couldn't get the one I needed from my phone.

Specifically AAA password.

Tried with CDMA Workshop, DFS, EFS Explorer (did "open sesame door" trick), QXDM but there's no way for me to read it (EFS Explorer shows both .efs_private and nvm as locked).

Tried calling Sprint but they wouldn't give it to me (expected).

So, I'm kinda stuck now and don't know what to do.

All suggestions welcome.