Best SIP provider for the iPod Touch?

[Alivis]

I am looking for jail breaking + installing the SIP calling app on the iPod Touch, but I don't want to until I'm sure that there is a reliable service provider. Are there any completely free SIP providers that provide unlimited calls to landlines free of charge?

[KerryG]

Your kidding right? You expect to find a company that will give you service completely for free?

Secondly, even though you install a SIP phone on the iPod touch, it is barely usable as you will not get incoming calls unless the phone application is running. As soon as you do anything else on the iPod the SIP phone client closes (no multitasking on the iPod touch) so it does not work as a regular extension.

Finally, I am not sure what this has anything to do with 3CX.

[TwigsUSAN]

Kerry is right as far as someone giving free service and what does this have to do with 3CX. However, the person did say that he was going to jailbreak his iPod Touch which means he would have to ability to multitask.