I haven't seen any Android SDK APIs which are supporting supplementary
services.

For being able to support such a functionality APIs like

-- hold
-- join
-- switch

have to be available.

This functionality is supported on the lower level of the telephony
support (look  in the Android source frameworks/base/telephony...).
That's why the current phone app is able to offer this functionality.

--
Roman Baumgaertner
Sr. SW Engineer-OSDC
·T· · ·Mobile· stick together
The views, opinions and statements in this email are those of the
author solely in their individual capacity, and do not necessarily
represent those of T-Mobile USA, Inc.

On Sep 29, 5:27 am, Nemat <nemate...@gmail.com> wrote:
> Hi,
>
> is it possible to add an incoming call with current call to make it as
> a conference call programmatically?
>
> Thanks in advance
> Nemat
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