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Je suis en Chine pour un long séjour mais je n'arrive pas à me connecter avec mon Z5
I am in China for a long stay but I can not connect with my Z5
GT
Hi @Cherchell17
Welcome to the community 
I have translated your post as this is a Global forum and all posts/replies must be in English.
Can you please elaborate? Are you having issues with phone calls, SMS messages, mobile data etc.
Let me know 
Thanks for clarifying that @Cherchell17 
Can you go to Settings > More > Internet Settings > Accept
This will download and install internet and MMS settings for your device. Once you have done this restart your handset and see if the mobile data will now load.
Let me know 