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We are looking for an application that will run on any Android based phone like a traditional GSM or CDMA VoiP gateway. This project can be in two parts. A mobile application running on the Android platform and able to register on a SIP registration server (Already existing). The Mobile application will register to a server and accept call from that server with SIP protocol. After that call will terminate to a GSM network. (this part just like a traditional GMS getaway) This mobile application can work with any Internet connectivity, coz GSM internet data normally disable during any GSM call. All call will pass with G729 codec The registration server may be Windows server based VOIP switch or any other server or customize server. This server will receive call from another VOIP switch server with SIP protocol. Certain number of registered Mobile will be able to assign in a group of gateway. The application should be able to use SSD for checking credit and recharging the SIM also on the on server side.
Project ID: 19556785
12 proposals
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Active 7 yrs ago
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12 freelancers are bidding on average $795 USD for this job

How Are You, Sir. I have mobile app( Android, IOS) , php and backend skill. I have experience with Social app, Dating app, Booking app, Video Streamming, IPTV app, Uber style App , Restaurant/Food Deliver app, photo sharing app, Spy app, Chatting app, Guard patrol and School management system based on Nfc Read/Write , Fitness App , Routing app based on GoogleMp,Youtubevideo,Fitness app, JNI(FFMPEG,OPENVPN) , Responsible mobile sit, Bluetooth app, Wifi module communication so on. I would like to work on your project.
$555 USD in 10 days
8.8
8.8

Hi. How are you? I have read your project description and I`m much interested in your project. I have 7+ years` experience in mobile using swift , objective-c , java , react , xamarin , ionic and so on. - android (android studio , java ) - ios(XCode , swift4 , objective-c) - React Native - Xamarin(C#, Forms, native) - webservice(backend api , admin panel , website) - cloud services such as firebase I have also developed many social apps and functional apps (with backend api and website , admin panel) such as Blockchain website and app , UBER style booking , Delivery , Sharing , Ddating , Voice&Video&Text Chatting , Video&Audio players , E-commerce , Live streaming , GPS , GEO , GoogleMap , Payment integration(PayPal , Stripe , Braintree , Peach , Zaincash etc) , QR generating and scanning I have been developing backend api and website by using PHP(Laravel,CodeIgniter etc), NODE JS, PYTHON and I have rich experiences in cloud backend service such as firebase. And I have professional knowledge and experiences in integrating most of 3rd party libraries. I will provide full service, from the development to the maintenance. I am looking forward to hearing from you soon.
$300 USD in 10 days
7.9
7.9

Hello! My name is Igor, I can help you I am a developer of applications for android Feel free to contact me at any time to discuss the details of the project
$490 USD in 7 days
6.0
6.0

We can develop you a SIP client application by using linphone. I undertand that you will enable G729 codec for audio calls and what codec will you use for audio calls?Do you want conference calls, call transfers etc.. Please confirm and INBOX for more details
$2,500 USD in 25 days
5.6
5.6

Greetings I have gone through the project description and i have great expertise with Android, Mobile App Development. You are welcome to chat with me so that we can discuss in detail. vw8190874vw could you please inbox me more detail about this project
$555 USD in 15 days
1.6
1.6

Hello, I am pleasure with your job as detailed. Thank you for the job posting. It’s a pleasure to meet you. I’d really like to work with you on this one if possible! I do have a couple of questions, but first I’d like to make you an offer and some background so you can check my work out. I have been developing kind of project within 4+ years so I’m fluent experience to handle project. You’ll get all the expected stuff like a great professional service and a fast turnaround, at a bit less, and I get a bit more exposure. If the above offer sounds like something you would be interested in, I’d love to hear from you. Best regards, Adebayo
$250 USD in 1 day
1.8
1.8

Good Day, I have seen your project description and i have relative experience with Android, Mobile App Development. Please initiate a chat with me so we can discuss about your project details and proceed from there. vw8190874vw please send as much detail as you have so we can get a clearer picture as much as possible.
$555 USD in 12 days
0.4
0.4

Android software development is the process by which new applications are created for devices running the Android operating system. Google states that[3] "Android apps can be written using Kotlin, Java, and C++ languages" using the Android software development kit (SDK), while using other languages is also possible. All non-JVM languages, such as Go, JavaScript, C, C++ or assembly, need the help of JVM language code, that may be supplied by tools, likely with restricted API support. Some languages/programming tools allow cross-platform app support, i.e. for both Android and iOS. Third party tools, development
$500 USD in 7 days
0.0
0.0

Hello, We have gone through your requirement and we have succinctly understood your requirement. We would like to discuss and freeze the complete scope of the project as it will help us to suggest you an optimal solution. We have developed various VoIP apps from scratch and we are a Platinum certified partner of 3CX as well in US. It is an IP based PBX system which follows SIP protocols. We are also well versed on PJSIP, CHAN_SIP, CHAN_PJSIP protocols. Hence, we are a perfect fit for this job. About Us: We are a US based company (located in Cheshire, Connecticut) and we have recently started our business operations in India and Bahrain. We will soon expand our operations in UK and Australia as well. We have a team of Web and Mobile app developers who have 10+ and 7+ years of experience respectively, on PHP, .NET, Java, Python, Wordpress, Android and iOS platform. We have also developed other apps on ERP, CRM, POS, Inventory Management, Accounting Management, Flight Bookings, Shuttle Tracking, Fleet Management, Weather Forecasting, School Management, Learning Management, GPS Navigation System, Automatic Vehicle Locator etc. Hence, please suggest us your availability for further discussion. Looking forward to hearing from you. Thanks
$833 USD in 10 days
0.0
0.0

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