Prison guards in Indonesia report that inmates in prison continue to run their drug trafficking operations while incarcerated with the help of corrupt prison guards. The inmates offer guards up to $500 (5 Million Indonesian Rupiah) in bribes to use their cell phones in order to make calls. (More impact of police corruption.)
Inmates were also smuggling cell phones in the prison at such at high rate that prison officials installed signal jammers to prevent the phones from working. However, according to the report by the Jakarta Post, the jammer could only block GSM signals and not CDMA phones.
Source: Fikri Zaki Muhammadi, “Drug dealers getting rich behind bars,” Jakarta Post, June 14, 2013.