M5 Nighthawk MR5200 Problem Acces Intern

Hi,

Thanks for you answer schumaku​ 

Indeed it's written SKU: MR5200-100EUS --> what does it means ?

this is the .json file in attached (It's kind of logs ? i was looking for that but i don't understand that much... anw thanks) .

Meanwhile, i succeed 1 time to open a web page ! (and i put APN to: "chili", ive found online another APN for salt they said) but after it didn't work anymore...

I looked at the statue of signal, it seems that all the time it "changes" frequency (pass from band: LTE B1 to B3), and when it is on B3 it seems-sometimes- it works. Can it be related to the stability of the frequency that doesn't work ? and my M5 try always to change dynamically ? (and i can't fix it's reception frequency). 

Idk, i try everything now... thanks for your helped man.