if you want to keep OTA updates , download only firmware for your CSC( service manual ): V3.14.4update : flash AP + BL + CP + HOME_CSCreset : save your data , flash AP + BL + CP + CSCon dialer : *#1234# or *#12580*369#go to :setting/about phone/software information/Service provider SW verexemple :XEF(active CSC)/XEF(sim1)/BGL(sim2)/EUX( EEA Europe)/BGL(originak CSC in Non Volatile memory )EUX : EEA ( European Economic Area )EUX=BTB BTE BTU EVR MET H3G 3IE O2U VDI VOD DBT XEF PHE PLS PRT TPH ITV PHN LUX ATO SFR MEO OMNHUI XEC DRE MOB ATL TCL VD2 VDF AMO FTM NEE SEB HTS XEO ROM BGL XEH XEZ ORX EUR CNX VDC VDHVGR OPV ORO ORS SIO COA COS CRO DCO DNL DTM MAX TMH TMS TMZ TNL TPL BOG MOT O2C SIM TIM VIP SMP TSIEUY : None EEAEUY=AUT SWC SEE MSR TOP MBMEUA : sold in United Kingdom , GreeceEUB : sold in Austria Belgium Germany France Spain Netherlands PortugalEUC : sold in SwitzerlandEUD : sold in Denmark Nordic countries Finland Latvia Sweden LithuaniaEUE : sold in Italy Poland Hungary Czechia Slovakia BulgariaEUF : sold in Albania Serbia Republic of North MacedoniaEUG : sold in Croatia Sloveniaother CSC and product codesNZO=XNZ TNZ VNZ NZCTSE=THL CAM MYM LAOmore informations : post 255edit1:according Samsung community eu , for unbranded deviceyou will have in first EUX/EUX/EUX/EUXafter enabled wifi your device , a simple reboot for customising the CSC for your countryexemple : XEF/XEF/XEF/EUX/XEFfree change CSC apk : https://forum.xda-developers.com/sho...5&postcount=37