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Android/iPhone SIP Dialer with source code using Xamarin

I have a VoIP platform for which I need an Android & iOS app phone based on the latest version of CSipSimple that you can reference for the overall design using Xamarin Forms. This should support all version of Android, iPhone

The app should integrate with the platform I built pull/push data via a REST API. The main functions of the app will include:

1. Making & Receiving VoIP Calls Over 3G/4G, WiFi, GPRS

2. Should not kill the battery of the mobile device

3. Address Book Integration with local Phone Address Book AND the platform

4. User Credentials Save / Change Username & Password

5. Volume Control

6. Protocol SIP (RFC 3261) Integration with UI

7. Media Support RTP (Real Time Transport Protocol) & RTCP (RTP Control Protocol)

8. Transport Mode TCP, User Datagram Protocol (UDP), TCP to UDP Interworking

9. Codecs G.723, G.729, AMR (Adaptive Multi-Rate Compression), iLBC, G.711, GSM.

10. Network Address Translation (NAT) Traversal Through Encryption & STUN

11. Voice Quality Silence Suppression, Packets Loss Management

12. DTMF - (Dual Tone Multifrequency) Generation & Detection (RFC 2833)

13. Call Status Indicator Displayed on phone screen

14. Call History, Call Detail Records

15. Speakerphone

16. SMS (through the platform).

17. App should voice and SMS encryption

The app will be marketed on the Google Market/Play and on iTunes, so it should be designed to those specifications.

I would prefer someone that has an "innovative point of view". The VoIP platform and business was designed and conceptualized to allow for multiple SIP phone types to be connected to it and perform different things. The intent here is to find a good developer to build this first project and build more in the future.

NOTE: There will be a focus on front end design clarity (which should be easy because we are using the other VoIP phone as a reference) but the code needs to be clean and error free (I can help test the apps). If you are not a strong developer that can put out well documented code that can be built upon, please do not bid.

Xamarin Platform Development using C# experience required.

Taidot: .NET, Android, C# -ohjelmointi, iPhone, Mobile App Development

Näytä lisää: voip phone for business, view wifi password android, using google apps, android, iphone, c# programming, mobile phone, wireless, sms apps for android, rest google api, rest api design, real time translation free, protocol translation, need free ios developer, mobile compression, latest version of ios, latest version of android, latest ios version, latest android version, iphone free design apps

Tietoa työnantajasta:
( 0 arvostelua ) Wallingford, United States

Projektin tunnus: #10949232

52 freelanceria on tarjonnut keskimäärin %project_bid_stats_avg_sub_26% %project_currencyDetails_sign_sub_27% tähän työhön

aistechnolabs

Greetings!! Thanks for the opportunity. I am very thankful for this opportunity. It’s really exciting that we have similar kind of expertise and work experience. [login to view URL] Lisää

$4793 USD 30 päivässä
(56 arvostelua)
8.7
ByteAnt

Hello, this is Valeriy from Byteant. Building a brand new app, especially in SIP market, is a serious undertaking. We took a look at CSipSimple and I can definitely say can develop a similar app, luckily enough we Lisää

$3000 USD 30 päivässä
(74 arvostelua)
8.4
SevenStarInfo

Hello, Greeting of the day! We are happy to discuss our proposal with you. KEY POINTS THAT MAKE US DIFFER FROM OTHERS: ~ We have 5+ years of experiences in Unity 3D, Eclipse, CoCoa 2d, Phonegap and major Androi Lisää

$3000 USD 30 päivässä
(73 arvostelua)
7.8
qitsol

Hi there, I've read your brief and can see that you’d like to build a Mobile app (IOS / Android). We have completed over 500 jobs on freelancer + upwork. We did similar projects. Please check our 241 reviews on Lisää

$2500 USD 30 päivässä
(99 arvostelua)
8.2
esolzsales

Placeholder bid, can we discuss in details please on the complete project specification. Pillars we work with 1. Commitment 2. Quality 3. Best Customer Service 4. Agile Mode Portfolio: [login to view URL] Lisää

$3888 USD 35 päivässä
(26 arvostelua)
7.9
MingFuCui

Hi Client, How are you? I have developed over 70 apps for 5 years. [login to view URL] [login to view URL] I want to discuss with you in detail. Lisää

$3000 USD 30 päivässä
(65 arvostelua)
7.5
promactinfo

Hi, We have gone through your requirement of app. which integrates with your VOIP platform. We have gone through the list of functions and flow you required in your app. We need to consider the below scenarios wh Lisää

$1800 USD 30 päivässä
(57 arvostelua)
7.7
KESHAVINFOTECH

Hi Thanks for your valuable time. :-) Just reply with 'Yes' and We will come up with a. Detail project plan with our comments/queries. b. Best-feasible-real COST & TIMELINE Latest Apps : [login to view URL] Lisää

$3000 USD 48 päivässä
(154 arvostelua)
8.1
nazimacnsoft

Hello, How are you? I have been working in app development for over 5 years If you have app idea, I can do that with my rich exps, perfect skills No worries, if you give me a chance or test, I can show you my awesom Lisää

$2500 USD 30 päivässä
(53 arvostelua)
7.7
futurenext1009

Hello, We have developed different applications I would like you to have a look at our past work. [login to view URL] [login to view URL] Lisää

$3333 USD 30 päivässä
(54 arvostelua)
7.4
JoomlaVogue

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 based projects: [login to view URL] Lisää

$1833 USD 20 päivässä
(70 arvostelua)
7.6
$2500 USD 30 päivässä
(32 arvostelua)
6.9
WienFuJong

hello how are you? I understand about your project. I have ever made Taxi booking app including backend(Laravel) and chat app(voice and video) by using quickblox, SnapChat and Couple Chat.(iphone and Android) And Lisää

$2368 USD 30 päivässä
(26 arvostelua)
6.9
rkatoch

*** Available to start immediately,and 40hrs/week and above if needed. *** Hello Sir, Warmest Greetings !! I have already developed several Android/IOS apps using C#,Xamarin technologies. I have gone thro Lisää

$3000 USD 40 päivässä
(9 arvostelua)
6.6
Shopify

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 Lisää

$3092 USD 50 päivässä
(14 arvostelua)
6.6
phonedroidapps

****We are here to turn your vision into reality**** We have done similar work according to your requirement. Please have a look [login to view URL] Lisää

$2680 USD 35 päivässä
(12 arvostelua)
6.7
shreeyait

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 Lisää

$2000 USD 20 päivässä
(40 arvostelua)
6.8
andrewrick25

Hey, This bid is been placed to secure our place among numerous [login to view URL] will regress our bid after discussing final functionalities. We are crop up as one of the most trusted names in the field of mobile and Lisää

$4000 USD 35 päivässä
(18 arvostelua)
6.8
seekdeveloper

Hi, 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, c Lisää

$3000 USD 30 päivässä
(14 arvostelua)
7.3
prashushinde9

Hello, I understood the initial scope of this project. Although i want to discuss further this job in order to prepare the final concept for this project. After Complete discussion over the call or in chat, i wi Lisää

$3092 USD 50 päivässä
(23 arvostelua)
6.5