If 500MB of free browsing a month in exchange for watching a few ads seemed too good to be true, it was -- Samba, the free, data-only MVNO is no more. According to the company's blog, it came down to the increasing price of wholesale data, which made the ad model unsustainable. Fortunately, if you bought a SIM card recently or paid for a data top-up (another option if you didn't want ads), you'll get a refund. There'll be no credit for time spent watching ads, though -- but it's a pretty good bet you were doing something else at the time anyway.
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