Zoiper LAX SIP VOLP SoftPhone

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Works very well. I pay about a pound a month to

make sure my app is always on, and it is, so well

worth it. It was a lifesaver in Tunsia on a local

cheap data SIM. No complaints, money well

spent. I was using a free app before, but its worth

paying a very small amount (they do have a free

option). I combine with Localphone numbers,

and its well worth it. Highly recommended, and

suggest theh small upgrade, money well spent.