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Denis 'GNUtoo' Carikli, 02/15/2020 12:46 AM


If you are new to modems, or to the hardware and software architecture used in smartphones and tablets, it's a good idea to start from the freedom-privacy-security-issues article .

Once this is done, there are more documentation on various aspects of the Cellular modem, from the protocol to implementations details.

  • BackupTheEFS: The EFS is a partition that contains modem data like the IMEI. If that partition is lost or corrupted, the modem doesn't work anymore, so be sure to backup it.
  • QMI: This modem protocol is used at least in the Galaxy S 3 4G (GT-I9305) and the Galaxy Note II 4G (GT-N7105). These devices need an implementation of the QMI protocol to add support for them in Replicant.
    • QMI-RIL: An attempt to implement the QMI protocol. The code can initialize the modem.
    • oFono-RIL also has an implementation of the QMI protocol that can be used on Replicant. This is now the route chosen by the Replicant project.
  • Samsung-ipc: This modem protocol is used in all the smartphones (and some of the tablets) supported by Replicant.

TODO: This list child pages but it doesn't have any explanation of the pages

Updated by Denis 'GNUtoo' Carikli 14 days ago · 7 revisions