It did solve the problem, but it's just one problem out of a million :)
You have another one:
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Jul 19 11:29:25 florent-laptop NetworkManager: <WARN> check_pin_done(): PIN checking failed to many times
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Insert your modem's SIM card in a cell phone and remove the PIN, as you would normally do with a regular SIM. Also, remove any PIN settings you set in NetworkManager. Then try connecting again and post your results.
It did solve the problem, but it's just one problem out of a million :)
You have another one:
====
Jul 19 11:29:25 florent-laptop NetworkManager: <WARN> check_pin_done(): PIN checking failed to many times
====
Insert your modem's SIM card in a cell phone and remove the PIN, as you would normally do with a regular SIM. Also, remove any PIN settings you set in NetworkManager. Then try connecting again and post your results.