900FD data plan issue after 900FDXXU1CPF4 upgrade - Galaxy S 5 Q&A, Help & Troubleshooting

Hello,
I updated my 900FD (XSG) from G900FDXXU1CPE1/CPB4 (mai 2016) to 900FDXXU1CPF4/CPB4 (june 2016) through OTA last week.
Since then I can no longer use data plan from sim2.
Configuration: French Sosh Sim1, French Bouygues Sim2
I tried both sim alone, regardless of slot 1 or slot 2: data plan OK
I tried both sim in a galaxy S6 (single sim): data access OK --> the sim cards are fine
The issue appears only if both cards are inserted, and Sosh card is in slot 1.
The issue is: data plan starts (or sometimes not) works for maximum 15s, and then stops.
I can't blame any operators, as sim cards and networks are fine, it's just the combination described above which fails !
I am using Sosh in slot 1 and Bouygues in slot 2 for the past 2 months without any issue (previous rom)...
I finally found that the Sosh card is NFC (NFC N9), whereas Bouygues card seems not to be NFC (nothing indicated).
NFC is off in the settings of the phone.
I am used to have personnal card in slot1 and Work card in slot2 for phone access, and don't want to try a firmware downgrade (downgrade may be risky).
Is anybody here have and idea how to sort out my issue ?
Regards,
Fred

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I have similar issue. My i9502 suddenly have sim card 1 locked. When I go to <Settings> <More> <Security> <Set up SIM card lock>, it is found SIM1 is locked.
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yklai said:
I have similar issue. My i9502 suddenly have sim card 1 locked. When I go to <Settings> <More> <Security> <Set up SIM card lock>, it is found SIM1 is locked.
I tried to tick and unlock it, but it says "0 attempts left" and as a result, I cannot unlock SIM Card 1.
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ranjib said:
I got the lemfo lf 17 since may 2017. A watch, that satisfied all my needs. But now (I'm not sure) after a system update the watch stucks when a sim card is inserted. Without sim card everything works as usual.
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