Well hot dog I get to find a statute before ARMY does.
The right to a phone call is linked to your right to counsel. If you are unable to make a call you are unable to get an attorney. So....
You have a statutory right to a phone call right here:
§ 2935.20.
After the arrest, detention, or any other taking into custody of a
person, with or without a warrant, such person shall be permitted
forthwith facilities to communicate with an attorney at law of his
choice who is entitled to practice in the courts of this state, or to
communicate with any other person of his choice for the purpose of
obtaining counsel. Such communication may be made by a reasonable
number of telephone calls or in any other reasonable manner. Such
person shall have a right to be visited immediately by any attorney at
law so obtained who is entitled to practice in the courts of this
state, and to consult with him privately. No officer or any other
agent of this state shall prevent, attempt to prevent, or advise such
person against the communication, visit, or consultation provided for
by this section.
STATE v. TURNER, 2007-P-0090 (8-1-2008)