The majority of the contraband that is brought into jails and prisons is concealed within the inmate’s rectum.
Generally, the criminals know that when they are going to their sentencing hearing, they hide drugs and cell phones, and sometimes sharp implements in their rectums.
There are not enough x-ray machines in the intake areas, plus most government agencies won’t purchase them.
Based upon the size of the phone smuggled in we can estimate how long they have been incarcerated.
Prisoner #1 "I need a Galaxy 7"
Prisoner #2 raises hand, "Been here 20 years, consider it done".