(This post only quotes Subsection J of 38.11, dealing with cell phones)
§ 38.11. Prohibited Substances and Items in Adult or Juvenile Correctional or Detention Facility or on Property of Texas Department of Criminal Justice or Texas Youth Commission
(j) A person commits an offense if the person while an inmate of a correctional facility operated by or under contract with the Texas Department of Criminal Justice or while in the custody of a secure correctional facility or secure detention facility for juveniles possesses a cellular telephone or other wireless communications device or a component of one of those devices.