Collins had been using the crutch after hurting his feet trying to escape police while on the run for the acid attack at the Mangle nightclub in Dalston, east London in April.
The court heard evidence was later found on the phone of calls and messages to family and friends.
Collins' lawyer, Audrey Mogan, said: "He did not have the phone for any sinister purpose. His partner at the time was heavily pregnant and gave birth the following November.
"He had this phone because he and his partner had been hounded by the media. He knows there was a phone in the cell but he knows the calls are recorded. Because of that he was afraid that information would get out to the media."