Hi,
By default the unit only starts the default bearer, however, there is a setting within our SDK which might enable an automatic connection of a user bearer within the slqs3GPPConfigItem API, note this explicitly has to be set by the application and the unit will not activate it. If you are setting this then I think it will connect.
If you are using the open source QMI library I do not know what might set this parameter.
pDefaultPDNEnabled
Always Connect Default PDN
A single BYTE value indicating the status of Always connect default PDN
0 - disabled
1 - enabled
Optional parameter
function SLQSGet3GPPConfigItem() returns a default value 255 if no 3gpp configuration is present
Regards
Matt