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[Q] Custom Non-Cellular ROM for Phones

OP padapa

16th May 2014, 05:42 PM   |  #1  
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I would like to build or have built, a ROM that replaces the standard cellular dialer with a SIP client. Then the phone would only use VoIP for calling, whether on cell data or Wi-Fi. That way you could connect to any VoIP service or PBX for your calling.


1) Has anyone already done this? If so, please point the way to them.

2) Do you think it would it be hard to do? What obstacles do you foresee?

3) Which SIP client would you use?

4) What cost ballpark would I be in to have one of the experts here at XDA do it as a paid project?

5) Do you think you could roam between data services in mid-call?

6) Would you have to stay within one line of devices?


Your thoughts?

padapa
Last edited by padapa; 16th May 2014 at 05:54 PM. Reason: Forgot one question.
18th May 2014, 01:56 PM   |  #2  
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Info 2 Current SIP Applications
Yes I am aware of the current crop of SIP apps and the Android internal SIP stack. While I am new to Andriod dev, I am fairly well versed in SIP and WI-Fi dev.

More correctly, I want to find out how to defeat the built-in system dialer for cellular calling and replace it with a SIP one.

Also, managing SIP keep-alives and the Wi-Fi interface to keep battery life as life as possible and make sure incoming calls are not missed because the phone is "asleep" ... be that the SIP client or the Wi-Fi interface.


padapa
23rd May 2014, 04:39 PM   |  #3  
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Opinions Please
Doesn't anyone have an opinion on this?

padapa
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custom rom, sip, voip
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