Is there any service available for making free international call from phone to phone?

Making outbound calls to customers to try and offer them other products and services. Also what is the key to reaching sales targets?

I searched google voice API and seems it doesnt support. And other methods? The phone numbers are from worldwide.

the network interface device on the outside of my house is wide open to people to make illegal long distance phone calls and I get billed for them

A "free apartment locator service" won't stop calling my cell phone. Legal (U.S.) and logistical questions inside. 1) I'm on the do-not-call registry. I've told these telemarketers that what they are doing is illegal, and that I'm reporting...

Hi. I'm new to VOIP technology. I have internet 7mbps with Charter (cable). I'm paying $100/month for internet, phone (that I barely use) and basic satellite tv which I don't even use as I don't have a dish or watch tv. So now I'm thinking to cancel...

Dear Sir, i'am a tunisian resident with my family in qatar for job purpose. making international call cost me high.right now i'm using the phone out service and i want subscribe on the phone-in service aswell if possible. best regards: Zouhair

I'm looking for a service or program that will convert a SMS/text message into a phone call, approximately 100 times per month. When making the phone call, the service or program needs to navigate through a simple "press 2 for support, press 3 for...

i used to make pc-to-pc calls. but starting month of march i can no longer dial any pc. lastnight i bought a $10 credit for my yahoo voice account, i was so happy i was able to call a friend's mobile. but when i tried making pc-to-phone call again today...

i am buying a Treo 700w just because it was a cheaper alternative off of ebay to have a qwerty keyboard. i just want to use it for making phone calls, and sending and recieving text messages. i do not want to surf the internet or check emails or any...