Android App that Converts calls from SIP to GSM

Looking for a developer who can build an android app that will convert calls from sip to gsm within the phone, not using any outside service or API.

You will also be designing the UI and backend but the UI can be simple as long as the conversion within the phone works.


Skills: Android

See more: sip gsm gateway android app, forward gsm calls sip android phone, android backend app engine, voip gsm calls android application, sip client android gsm calls, android app sip gsm gateway, android app mssql backend, android app server backend, android gsm calls sip, android apps gsm calls, android app php backend secure, android app gsm calls, android app development backend, android gateway sip gsm, android trunk sip gsm, android backend app, android app cms backend, sip gsm gateway android, sip gsm android, android app php backend

About the Employer:
( 191 reviews ) Portville, United States

Project ID: #13412153

32 freelancers are bidding on average $604 for this job


Hi I would like to participate in developing your project. I think I have experience in Android projects. I have already developed many Android apps. You might have read this in my profile. Please send me your det More

$526 USD in 10 days
(90 Reviews)

Dear ! I'm very interested in your job. I don't need to boast my portfolio, but as you can see in my profile I am a senior mobile developer in I can create the best quality mobile app that can turn More

$736 USD in 10 days
(108 Reviews)

Dear sir I have check your project description .. Can we discuss about your project detail function step by step ? Then we can confirm every requirement with together Then We can confirm all working and pa More

$555 USD in 10 days
(36 Reviews)

Dear Sir, Don't worry about your job and trust me. I am very qualified for your job and I need my opportunity to work with you. My opportunity will be provided by you exactly, I am very happy about this opportunity. Le More

$888 USD in 10 days
(19 Reviews)

Hello Sir, First of all, we would like to tell you how we will initialize the project with you Please have a look at our portfolio for Mobile App and Unity Game based projects: [login to view URL] More

$333 USD in 10 days
(54 Reviews)

Hello ! We want to discuss about your project as we have experience in it. What Differentiates us from the other freelancers : # Experience of more than 5 years in Unity 3D, Xcode, CoCoa 2d, Phonegap and major More

$750 USD in 15 days
(28 Reviews)

Dear Client,Hope you doing well. I have gone through your requirement and as per my previous work experience i am ready to start work immediately on your project. yes i am very much expertise with Java script,XCod More

$526 USD in 10 days
(25 Reviews)

Greetings from [login to view URL] Here are few of the apps that we have done in android 1)HHWT ( Singapore customer ): [login to view URL] 2) nimble wireless andro More

$662 USD in 3 days
(69 Reviews)

I want to discuss this project with you further, let me know the best suitable time for you to schedule the meeting, Feel free to message me at any time, i used to be online 14 hrs in a day on this website so probably More

$773 USD in 20 days
(12 Reviews)

Hello, Greetings from Ruby On Rails We have recently completed the similar project and would like to show you a live demo which is similar to your project . I would like to discuss your project in more details so d More

$773 USD in 20 days
(7 Reviews)

Hello Sir, Hope you are fine there. We are having good experience with Mobile App projects and the reason we came across here to give the best output to your project with supreme quality. We have developed More

$555 USD in 10 days
(15 Reviews)

Hello , Hope you're doing well. Me and my team working on this area since last 7 years and developed some milestones apps before as well. I have checked your project post ,Its a RND stuff and we need to check More

$666 USD in 20 days
(7 Reviews)

Dear friend, We read through the job details extremely carefully. we are absolutely sure that we can do the project very well. We wish to have a discussion with you. We have some questions for you. Kindly More

$666 USD in 25 days
(15 Reviews)

Hello, I have read your project description carefully and I am absolutely sure that I can do your project very well. Please check my apps . [login to view URL] [login to view URL] More

$400 USD in 10 days
(10 Reviews)

Hello, I read your project details and I would love to work with you. Services: -Backend Development: PHP, Ruby on Rails, Wordpress, Mysql, API, Web Services -Mobile Applications: Android(Java), iPhone & i More

$500 USD in 10 days
(7 Reviews)

Hello, I am Shrey Sharma. Hope you have been fabulous :) I have seen your project titled "Android App that Converts calls from SIP to GSM" and have some questions to ask: 1. Is it for the business use or per More

$600 USD in 20 days
(17 Reviews)
$555 USD in 10 days
(4 Reviews)

Friendly Gentleman! I will be very happy working for you with this project. I can work for you with satisfy result. Your job is my good skill Thank you for your reading... Pleas contact me, I am always ready for y More

$555 USD in 10 days
(16 Reviews)
$266 USD in 10 days
(8 Reviews)

I have read your post and understood your requirement and I have great experience working on -Native: iOS, Android (Objective-C, Swift, Java), PhoneGap, JNI, NDK (C/C++),Cocoa, Cocos2d game engine, OpenGLES, cocos2d-x More

$1030 USD in 10 days
(3 Reviews)