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SIP PSTN API To Determine Call Forwarding Number on Mobile

I have an iOS and Android app that allows users to set up a custom voicemail service. To enable the voicemail service, we identify the user's phone carrier (Verizion, T-Mobile, AT&T, etc.) and have the user set up conditional call forwarding to a phone number we manage on [login to view URL]

Once a user sets up the conditional call forwarding, I need to verify if the call forwarding was in fact set up correctly. I have two options to do this: One option is to call the phone number of the user, have our app reject the call, and then look for an incoming forwarded call from that user's phone number. However, it seems like there could be a simpler process. The second option I am trying to figure out is a way that I can just call the user (it's okay if the user's phone rings once or twice), and then retrieve the actual SIP header information and extract the call forwarding phone number. This way we can see at the SIP / PSTN level the number that is configured for the conditional call forwarding.

To apply let me know if you know how to do this, and how long it would take you to set up.

welcome candidates.

Taidot: Mobile App Development, iPhone, Android, Asterisk PBX, VoIP

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Tietoa työnantajasta:
( 1 arvostelu ) Medellín, Colombia

Projektin tunnus: #27552719

9 freelancers are bidding on average $26/hour for this job

(129 arvostelua)
8.4
itgurussoftware

Hello, Trust you are doing great..!!! Definitely, will provide you dedicated developer for your project with 3 Month Free Warranty Support. IT GURUS SOFTWARE Details: Experience: 10+ Years Projects: 450+ Employees: Lisää

$25 USD / tunti
(46 arvostelua)
7.5
seekdeveloper

Hi, I'm a talented developer for iOS, Android. I have 11+ years of software experience in fortune 500 companies and I'm here for you! I have already developed a great number of various applications, namely on-demand s Lisää

$30 USD / tunti
(14 arvostelua)
7.3
Alphawizz

Hello There, I came across your requirements for iOS and Android app that allows users to set up a custom voicemail service and believe that I will be an ideal match for you. I am a Senior Mobile App Developer with Lisää

$25 USD / tunti
(14 arvostelua)
6.3
(16 arvostelua)
6.0
tanasvlad

Hi Johan, Greetings from Kyiv. I am a full stack web/mobile app developer who has vast experience for over 12 years. Your job is really caught my eyes because my experience and expertise are perfect match for your job Lisää

$25 USD / tunti
(3 arvostelua)
2.9
jcpriotti

The idea is that a sip proxy can check the Diversion header on the Invite coming from the DID provider ([login to view URL]).We can trigger the test callsAsterisk Manager Interface via a web connection. As all the test calls Lisää

$30 USD / tunti
(1 arvostelu)
1.0
(1 arvostelu)
0.8
dhatu054

Hi there, I have much experience on this field of SIP-PSTN call forwarding. I can implement it using SIP trunking. Please ping me for detailed discussion. Thanks.

$20 USD / tunti
(0 arvostelua)
0.0