Hi Leo,
here is complete provision file. I've checked consolelog messages in the phone and there are no error messages about configuration file parsing.
If single line is configured registration works correctly.
If two or more lines are configured, phone tries to register first line and it fails because REGISTER message contains credentials from last configured account in SIP Authorization header (From, To and Contact headers contains correct username as you can see in my original post). Phone never tries to register second account because registration of first account fail. In other words phone registers alice's account with bob's credentials.
I own the Asterisk, it rejects registration with 403 Forbidden (Bad auth) and logs:
[2016-10-22 11:59:55.552] WARNING[2237] chan_sip.c: username mismatch, have <alice>, digest has <bob>
It corresponds with REGISTER SIP message, see attached sip-register.txt.
--Edit:
In case I switch SIP transport protocol from TCP to UDP, phone will register successfully second line with bob's username and bob's credentials however it still tries to register first line with alice's username and bob's credentials.
Also tried to change alice to 1111 and bob to 2222, however same result, it still uses invalid credentials: username mismatch, have <1111>, digest has <2222>.
