Many SIP phones require users to set many different options to configure an account. Lumicall users can configure their account by entering only the SIP address and password.
For this to work, Lumicall expects the following:
Please try dialing the SIP address email@example.com on your phone. The easiest way to do this is to click the link on your phone, or to open the main Lumicall dailer screen, and put firstname.lastname@example.org into the box.
ZRTP is the default mode of encryption. ZRTP mode is dynamic: if you call someone without ZRTP in their phone, the call will still proceed, but it will not be encrypted, and you will be alerted by a red warning on the screen.
One particular benefit of ZRTP is that it provides end-to-end encryption: if both you and the person you call see the same code words on your screen, you can be certain that the call is not decrypted and re-encrypted in the Lumicall server.
SRTP is a static mode of encryption. It is appropriate for closed networks where all users have SRTP, and where you have significant trust in the servers on the network. A typical example is a privately managed SIP proxy server that is administered by someone you know and trust within your company.
The ZRTP encryption scheme uses a Diffie Hellman key agreement algorithm to generate an obscure and random password for encrypting the call. The Diffie Hellman algorithm uses a special mathematical technique to generate the same password on both phones (caller and callee), without having to send the password from one phone to the other. The code words that appear on your phone are a `short authentication string', they are a by-product of the mathematical process. If you and the person you are speaking to both see the same code words, and if you are confident that the person's voice sounds authentic when you read the code words to each other, then you can be confident that the call is encrypted end-to-end.
Android phones, as they now have greater market share than all the other smartphones combined (in other words, n(Android) > n(Blackberry + iPhone + Nokia))
Yes, the Galaxy Tab can make phone calls over the internet using Lumicall. The speakerphone is enabled by default on this device, and the quality is quite good.
TLS, ICE (RFC 5245) for NAT traversal, DNS SRV, ENUM, ZRTP, SRTP
Yes, press the menu button and enter your Kamailio server details as a new SIP Identity
Yes, press the menu button and enter your repro server details as a new SIP Identity
Yes, press the menu button and enter your FreeSWITCH server details as a new SIP Identity
Yes, press the menu button and enter your Asterisk server details as a new SIP Identity
If the VoIP provider supports SIP, TLS and ICE, it should work