I've tried all these 3 VoIP services on my Nokia E61:

1) fring.com
The best SO FAR. Can call & chat Skype users all over the globe. Lag about 1 to 2 secs.

2) gizmoproject.com
The best for both landlines and mobiles within Malaysia for FREE. But the T&C very strict. Lag is less than 1 sec.

3) truphone.com
To activate and re-validate every new release via SMS will be charged to your bill. Lag is less than 1 sec.

4) iSkoot
Another Skype VoIP-enabled. Virtually, NO LAG!. But limit to Skype voice. No chat.

I'm on Celcom D68 as well.

Compare to WiFi, 3G is having more lag than WiFi. 3G is about 1 sec and WiFi is about 0.5 sec.

All in all, I use Gizmoproject.com. Free calls to both landlines and MOBILES!!! (Provided you and your contacts having active status on "All Call Free (ACF)" plan.)

Not many ppl in Malaysia realise this YET. And yes, may I repeat again, U can call MOBILES (Celcom, Maxis or DiGi lines) for free (with fair usage policy of course).

As a conclusion:
Nokia E61 (or any other 3G/VoIP-enabled phone) + Gizmo + Unlimited 3G (or Wifi) = "untimed" calls.

Since Gizmo works very well with Nokia Symbian phones, I'm assuming 6120 classic as the cheapest HSDPA-Symbian phones:
RM888 (Nokia 6120 classic) + RM0.00 (Gizmo install in 6120 classic) + RM68 per month (+ 5% tax) = "untimed" calls to landlines & mobiles.

I'm willing to share my SIP number for testing purposes. PM me if u're interested.

This post has been edited by dgtel2: Oct 17 2007, 10:20 PM

Gizmo-Gizmo = no lag at all. Just like GTalk, YM or Skype.
Gizmo-mobile (via 3G) = lag 1 sec.
Mobile-Gizmo (via 3G) = lag 1 sec.
Gizmo-mobile (via WiFi) = lag 0.5 sec.
Mobile-Gizmo (via WiFi) = lag 0.5 sec.
Mobile-mobile (via Gizmo+3G) = lag 1 sec.
Mobile-mobile (via Gizmo+WiFi) = lag 0.5 sec.

When I mention Gizmo-mobile meaning I'm calling from desktop (thru Gizmo client via 3G) to the other party's mobile number. The other party is using normal GSM line. You need to add international+countrycode for ALL contacts. E.g. for landlines it is 00603XXXXXXXX. For celcom mobiles it is 006019xxxxxxx.

All the above will depend on each party's type of connection (whether 3G or WiFi). Overall, WiFi connection is much better than 3G. It's kind of confusing for me to explain. You need to feel it urself to believe it. And now, I only spend money for Celcom Minutes and D68 plan. No more landline or Streamyx! Bye-bye TM... (even Celcom under TM, I'm happy with Celcom service...SO FAR....)

i've already highlighted this VoIP thinggy to my officemates as well as my pals. Most of them reluctant to use VoIP simply becoz

1) 3G is still expensive.
2) Satisfy with current means of communication even though they have to pay more than what I do every month.
3) They know nothing about VoIP's basics.

But I do encourage them to start using their 3G unlimited with VoIP. I even volunteer myself to do the settings in their handphones as well as their desktop/laptop. As a result, they were impressed with VoIP capabilities but not the VoIP reliability (lag issue of course). As for me, I'm happy with current VoIP performance as long as it is 'free'.

After digging up the functions and features of gizmoproject.com combined with gizmovoip.com, I finally managed to call both landlines and mobile numbers for FREE via my Nokia E61. Now, all my contacts can reach my mobile for FREE (provided that both of us have All Calls Free (ACF) active).

Anyone interested to try this? PM me. You do not need 3G if u're using the Gizmo desktop client. But you definitely need 3G if you want to call from mobile to mobile for FREE.

I know this sounds crazy and the word FREE is too good to be true. But I have tried it. No hidden cost. I can call to any Celcom, Maxis and DiGi numbers.

This post has been edited by dgtel2: Oct 20 2007, 07:28 PM

Gizmovoip is just a small/lite version of gizmo client specifically designed for the mobile. When you install gizmovoip, there is no client installed in your phone. And your phone MUST support VoIP feature. In order to USE gizmovoip, you make INTERNET CALL and not voice call. E.g. Nokia E-series:-

Contacts > [select the contact] > Options > Call > Internet Call (Oh...now we know that Internet Call = VoIP)...

But if you want the full gizmo client installed in your mobile, you need to install the Nokia Betalabs Gizmo for S60. For E61, the Nokia N80IE is compatible. You need to test both installer to see which one works/compatible with your phone model.

Having Gizmo for S60 installed in your phone, to make a VoIP call:-

Contacts > [press right on your keypad. Here you should see Gizmo client] > select "Go online".

Depends on your settings, the Gizmo client will either:-
1) Automatically connect to WiFi or 3G, or
2) Request a connection type (Automatic WLAN, or Manual WLAN, or GPRS].

If you have 3G unlimited, go for GPRS. If you have access to WiFi, select Automatic WLAN. You will be eventually (could take 30 seconds) connected to Gizmo server. Now you can test your account by INTERNET CALLing "611" to hear your account balance, voicemail, etc. YOU FIRST INTERNET CALL MAY JUST CONNECT BUT NO RESPONSE FROM THE SERVER. Call again, then you will hear a lady announcing your gizmo account status. You can test other VoIP numbers for FREE.

As far as i know, currently, Gizmo is giving USD0.10 free call out for us to test the service. Use it wisely. I'm using the free credit to make sure my All Calls Free (ACF) status is active.

This post has been edited by dgtel2: Oct 23 2007, 09:00 PM