Android APP, SIP (VoIP) Dialer IP to GSM


I want to make Android APP that allow me to send calls to the mobile via SIP ( VoIP ) and this calls can me dialed ( Outbound ) Via the GSM ( the SIM card which is installed in the phone )

In more details

Now we have a mobile device and Asterisk server, I want to link the mobile to the server and this server will send the call (SIP) and the mobile will make this call via the SIM installed

In a way or another this APP will make the mobile work as a VoIP to GSM gateway

Skills: Android, App Designer, Asterisk PBX, Mobile App Development, VoIP

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About the Employer:
( 0 reviews ) Poland

Project ID: #17870247

5 freelancers are bidding on average $227 for this job


We are the top linphone customization team in the market. we dealt with top companies of telecom. We understand that you are looking to connect your SIP server and Mobile SERVER We have developed more than 60 l More

$277 USD in 1 day
(8 Reviews)

Hi , I have read your requirements and willing to work with you in this project. Irecently add this feature in my ongoing project , I can help you in this project , Kindly come in chat to discuss more in detail. lo More

$250 USD in 3 days
(9 Reviews)

Hello Hiring Manager, I read your job descriptions carefully, I am very interesting in your job. My motive is to provide high quality work and client satisfaction delivered before your deadline. Android | i More

$250 USD in 15 days
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$138 USD in 4 days
(2 Reviews)

Hello Hope you are doing good. I have gone through your requirements and i am confident that i can complete this task as i am working with Voip apps using pjsip and Linphone. Let me know if we can discuss about it mor More

$222 USD in 4 days
(1 Review)