Delphon Nicholas, 29, from Lewisham, south-east London, was convicted on Thursday of murdering Andrew Wanogho, in Brockley, on 8 April 2006.
Nicholas made dozens of calls from London's Belmarsh prison to gunman Trevor Dennie, the Old Bailey heard.
Dennie, 33, from Deptford, south-east London was also convicted of murder and jailed for life.
Both men were ordered to serve a minimum of 30 years in prison.
In Great Britain, as in other places I'm sure, the smuggling of contraband into prisons is epidemic. This BBC report says that 3,473 mobile phones or sim cards were discovered in prisons in England and Wales between October 2006 and September 2007.
What should be done about this? Are the guards at fault? Is it really that hard to prevent this kind of thing?
What's your opinion? Dangerous prisoners should certainly be deprived of the means of committing further crimes, I would say.