Which VoIP Applications to Use?

As I promised on my previous posting, I am going to discuss several VoIP applications. Here, I would like to discuss EQO and fring. I was planning to discuss barablu in this posting. Unfortunately, for some reasons, I couldn??�t make any call yet. I have contacted their customer service asking for advice.

EQO

Web site: http://www.eqo.com

Technology: VoIP over cellular

IM support: AIM, MSN, Yahoo! Messenger, Google Talk, ICQ, Jabber.

What I like:

We don??�t need WiFi hotspot to make a call. It uses VoIP over cellular technology; so as long as we have cellular connection, we can make a call. This solution does not suitable for us who are in a roaming area though.
It supports all popular Instant Messaging services.

What I don??�t like:

It is a Java application. This may be just my personal opinion, but I feel that Java applications are slow and require a lot of memory.
The user interface is a little bit odd. For example, most S60 applications use left soft key for OK and right soft key for Cancel; EQO uses the other way around.
Searching a contact is difficult. We can only search based on the first character of the person??�s name.
The service is not so reliable. The service number sometimes cannot route my call to the destination although the phone number is correct.

fring

Web site: http://www.fring.com

Technology: Proprietary, SIP

IM support: Skype, Google Talk, MSN, Twitter

What I like:

It is my favorite VoIP application for S60 platform so far.
It supports Skype and SIP. It is still very rare that VoIP applications support both of them.

What I don??�t like:

The user interface is a little bit complicated. For example, there are several icons at the top with Skype, Google Talk and MSN logos. My first impression was that we should be able to switch between those icons. In fact, it is not possible. Another example, it is difficult to find the phone number from the contacts list. We can only see the phone number if we select Call menu.
No support of Yahoo! Messenger.
The caller??�s number does not appear in the callee??�s phone.

Compatible devices: S60 2nd, 3rd Edition, Nokia Nseries, Nokia Eseries.