Hi Guillaume,

<snip>

> Unfortunately I come to the conclusion that if I want to send one same
> SMS to 3/4/5/... recipients with an application using oFono middleware,
> I will not be able to send them through the same RRC channel, unless I
> queue them offline.
>

If such a feature is important, then you do have a point.  However, 
implementing _anything_ by introducing an arbitrary delay is simply 
wrong.  I believe they teach the reasons for that in Operating Systems 
101.  You are introducing a race condition that will break things at the 
most inopportune time.

If we really require multi-recipient SMS to go on the same RRC channel, 
then the best way to do so would be to introduce a new API specifically 
for this use case.

Regards,
-Denis