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A comment on The borderless SIM is finally here. Parent comment

Re:The borderless SIM is finally here by geocar on Tuesday June 09, 2015 @08:13AM (#9685386)
I've set up Google Voice -> US SIP -> UK SIP -> 3 Mobile. This gives me a US number to give out to Americans (who don't want to dial my UK number) that they can text/call. I can then make calls when on Wifi or using a Phonecard app which automatically dials my UK SIP and forwards the call via the US SIP provider. I don't have to switch SIMs or give up my UK number.

This works well for me (since I travel between the US/UK often)

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Re:The borderless SIM is finally here by koyote on Tuesday June 09, 2015 @08:24AM (#9685432)
Can't you just use Google Voice on Three's 4g connection/Wifi to make/receive calls/texts on your Google Voice number using Hangouts?

What's the purpose of the two SIPs?

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Re:The borderless SIM is finally here by geocar on Tuesday June 09, 2015 @09:06AM (#9685638)
Three doesn't have any 4G when roaming, and the 4G isn't that great even in London (compared to say: Vodafone).

Texting with Google Voice is fine though.

The two sips are registered to the same installation of asterisk: The UK provider gives me a UK number and rates equivalent to a UK landline.

The US provider gives me a US number (which is registered with google voice) and rates equivalent to a US landline.

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