Do giffgaff-to-giffgaff free calls work on O2 and Tesco too since they're sort of all the same network?
matt101101 / MOD
Apr. 16, 2012 at 18:24
Not as far as I know, though having never been on Tesco or GiffGaff, I can't be sure (I have been on 02 but that was before GiffGaff existed and I never rang anyone on Tesco Mobile, if they existed either).
Apr. 16, 2012 at 20:58
Nope, they don't.
A friend on GiffGaff says it only works to other GiffGaff members.
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