I've Never Been So Happy To See Cellular Phone Service Screw Up:

Sometimes when cell phones don't work, it's a really GOOD thing....

The attempted London car bombings were meant to be detonated by calls to mobile phones in the two vehicles, but failed for technical reasons, according to a report.

The calls made on the phones allowed police to trace those behind last Friday's failed attacks, the Evening Standard said, without giving sources.

The phones were meant to set off blasts when they were called, but the devices failed to detonate the mixture of gas canisters and nails in the two Mercedes cars parked in London's entertainment district.