Hi denis and ofono guys, On 28. 03. 13 15:24, Denis Kenzior wrote: > > Is the modem auto-attaching to GPRS by default? You might want to turn > off that behavior if posible. > I'm still searching why I've issues on SMS with SIM5216 GSM module and T-Mobile. What did you mean by auto-attaching to GPRS by default ? To bring GPRS up, I configure it and I call ConnectionContext.SetProperty with Active=1 and then, I've got GPRS. I dig out this old answer because I searched why in ConnectionManager I've got Bearer: "none". Then, I've found a place (in gprs_initialized() function) where ofono try to get data bearer. By default, ofono uses "AT+CPSB=1" and a callback on "+CPSB:" reply. There haven't "AT+CPSB" command for SIM5216. I thought I needed to add a quirk like Telit or Huawai. I searched on internet and found an old message from this list ("[PATCH 6/8] gprs: data bearer for telit with PSNT") where you, Denis, answer to Christopher Vogl about the data bearer quirk which made for telit and wonder : "Do you really need to query this? In theory if we are turning off auto-attach, we should never be in a state where the bearer should be queried." So, I don't know if I must add a quirk (there AT+CNSMOD command for SIM5216). What does auto-attach mean ? Regards, Anthony Viallard.