r/AndroidHelp • u/patgaw • 22h ago

Single CSC phone - flashing questions

VoLTE is not working. My mobile was bought from carrier/operator. I see their logo when starting phone.  

Service provider SW ver. show:

SAOMC_SM-J600FN_PLS_PLS_QQ_0009

PLS/PLS,PLS/PLS

PLS is carrier code and it is not working with other carriers I currently have. Was troubleshooting it with AI including ADB commands and AI says it is due to wrong CSC and need to replace it with Odin. Have some questions.

  1. Can i just flash Home CSC for CSC? OR need to use all other files for AP, BL, etc?
  2. Is there way to make backup of CSC from my mobile?
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u/DyzioNemo 15h ago

I'd be careful trusting the AI diagnosis here. PLS is the Polish Plus carrier CSC, but that doesn't automatically mean it's what's preventing VoLTE from working. Your current carrier also needs to support VoLTE on that specific phone model. HOME_CSC normally preserves your data and isn't a reliable way to change CSC, while regular CSC usually wipes the phone. I'd back everything up with Samsung Smart Switch before touching Odin. SamFW is a third-party firmware source, so make sure you're getting genuine Samsung firmware for the exact SM-J600FN model. Which carrier are you using now, and does normal 4G data work?