Add modem config for French provider Free mobile

[dcaliste]

The modem is recognised as:

$ getprop persist.vendor.somc.cust.modem0
S8683.1

The PR is using the generic modem configuration file. I've tested it on SailifshOS (4.6.0) with an Xperia 10ii and:

• VoLTE service register,
• incoming calls are handled on 4G, as for outgoing calls,
• SMS reception is working (SMS emission not tested yet).

[Paulbouchara]

Hi, you tested only with a 10II ? Because there is a specific configs in the latest mark 4 and upwards firmware, I wonder what it does more because the functionality is as full as it is with the generic one you're pushing.

Interesting, you can PM me (in french if you wish ;) ) so we can test further

[dcaliste]

Indeed, I'm just the owner of a mark II device. I've no idea what are the differences with the mark IV blob file, but Free mobile is advertising the mark IV as a supported device on their website (see https://assistance-1.free.fr/mobile/terminaux/), while the mark II is supposedly not supported. I've not tested the VoLTE roaming (which is supposed to work with the mark IV). The mark IV is also noted as supporting eSim, which may or may not be the case for the mark II, or may or may not be handled by this mbn blob file.

@Paulbouchara , don't hesitate to mail me on the address used for the commit, I personnally don't know how to send a PM with Github : /

[Paulbouchara]

Yes, the volte compatibility have been checked by me as I had a few discussion with the network engineering team of Free (@Free_1337)

The mark 4s European variant does have an esim slot, which is quite convient tbh, I don't know yet how to inspect the mbns files, maybe I could just ask Free some details.

Unfortunately, on stock firmware, mark 3 and downwards aren't supported, however this is sodp so we can make this work for everyone :)

Will mail you when I'll be available for this, I'm currently on my phone.