Hi Denis,

Thank you very much for your quick and helpful reply.

The problem is a bit vulgar actually. That's a shame that I took your
time for that but I have another question as I am not sure about the
findings below.

I had tried to get dump with gsmdial and gsmdial successfully
activated the context. So the problem is that we have authentication
method set to NONE in ofono. But gsmdial uses CHAP by default.
I have manually set the auth to CHAP for the context in ofono and
ofono successfully activated the context.
There is the provider info from mobile-broadband-provider-info about
my provider:

    <provider>
    <name>China Unicom</name>
    <gsm>
    <network-id mcc="460" mnc="01"/>
    <apn value="3gnet">
    <plan type="postpaid"/>
    <usage type="internet"/>
    <username>uninet</username>
    </apn>
    <apn value="3gwap">
    <usage type="mms"/>
    <name>联通彩信</name>
    <mmsc>http://mmsc.myuni.com.cn</mmsc>
    <mmsproxy>10.0.0.172:80</mmsproxy>
    </apn>
    </gsm>
    </provider>


Am I correct that ofono must use CHAP if the auth method is not
specified in the db?

I see that the technology used by the modem is HSPA. And I see the
following in ofono/drivers/atmodem/lte.c:

    /* change the authentication method if the  parameters are invalid */
    if (!*ldd->pending_info.username || !*ldd->pending_info.password)
       auth_method = OFONO_GPRS_AUTH_METHOD_NONE;


And in ofono/plugins/mbpi.c:

    /* select authentication method NONE if fit */
    if (!ap->username || !ap->password)
    ap->auth_method = OFONO_GPRS_AUTH_METHOD_NONE;


As well as ofono/plugins/fileprovision.c::

    /* select default authentication method */
    (*settings)[0].auth_method = OFONO_GPRS_AUTH_METHOD_NONE;


ofono/src/lte.c:

    /* this must have a valid default */
   if (!gprs_auth_method_from_string(auth_method_str,
   &lte->info.auth_method))
   lte->info.auth_method = OFONO_GPRS_AUTH_METHOD_NONE;


I am not sure about the standards which may be relevant here. Sorry
for asking this but I thought that we should use CHAP by default,
don't we?

Thank you again and have a nice day.

Yours sincerely,
Sergei Golubtsov.