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SIP PSTN API to determine Call Forwarding Number

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.

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

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

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Tietoa työnantajasta:
( 3 arvostelua ) Vari, Greece

Projektin tunnus: #27556364

6 freelancers are bidding on average $21/hour for this job

MobiStudioz

Hello I can build call forwarder mobile application as per your requirement. ►►Functionality outlined- -User profile management -Gps -Forwarding option -SIP -Phone forwarding ►► Design Portfolio ◄◄ http://bit. Lisää

$18 USD / tunti
(49 arvostelua)
8.0
AltiuseCreaton

Hi, I can help you in SIP PSTN API to determine Call Forwarding Number on Both andorid /IOS apps. I checked your both options but need to talk more in detailed about those options to achieve better approach. Let me k Lisää

$25 USD / tunti
(10 arvostelua)
5.0
tanasvlad

Hi, 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. - I Lisää

$20 USD / tunti
(3 arvostelua)
2.9
Appslobby789

Hello there! I came across your job post and I understand your requirements. I am an experienced Mobile App Developer. I have worked as a Dedicated resource for clients across the world for over 8 years now. I have th Lisää

$20 USD / tunti
(0 arvostelua)
0.0
oxygenweb

Hello, We are a team of developers. We have 8+yrs of experience in this field. Our team reviews your requirement and we are happy to introduce our self as we fulfill your entire requirement within the time limit. We ar Lisää

$20 USD / tunti
(1 arvostelu)
0.0
cavemanHQ

Hi, I am Mohcene and we are a team of 40+ professional, working on almost all platform. We are in the software development industry for the past 14 years and have worked with Fortune 500 companies. I have read the des Lisää

$25 USD / tunti
(0 arvostelua)
0.0