Hi! I'm still fighting with SMS sending on Motorola Droid 4. Yes, its kernel driver is somehow interesting... and work in progress. If packets are split correctly, SMS sending works. ofonod[2900]: OutSMS: > AT+GCMGS=\r ofonod[2900]: OutSMS: > 3100098106343401F30000A70A73F45B4E07D1CB733A ofonod[2900]: OutSMS: < +GCMGS=10,"00/00/00,01:00:00+00"\r\n But if data are sent in one write, it does not... (and even this is not easy to do with ofono). ofonod[3131]: OutSMS: > AT+GCMGS=\r3100098106343401F30000A70A73F45B4E07D1CB733A ofonod[3131]: OutSMS: < :ERROR=18\r\n Handle command response: :ERROR=18 Handle terminator list Is there easy way to do the splitting? I can do g_at_io_write(data->send_chat->parent->io, buf, strlen(buf)); g_io_channel_flush(data->send_chat->parent->io->channel, NULL); But that needs exporting functions I guess you'd rather not have exported. Is there better way? Best regards, Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html