The X account of Binance’s former CEO, Changpeng Zhao, has apparently become active again and has followed a Solana news account, despite Zhao being in prison.

Federal inmates are prohibited from using mobile phones. Indeed, for the most part, he seems to have stuck by this and has not posted anything since May 22.

His X account following @solananew, however, brings this into question and raises questions about how it could’ve happened. To begin with, Zhao may have been able to acquire a mobile phone in prison and log into his account.

Prisoners smuggling phones into prison is a commonly reported issue. According to Forbes, it’s easier to smuggle a phone into a minimum or low-security prison, such as the FCI Lompoc II prison where Zhao is currently being held.

Alternatively, Zhao may have given someone else access to his X account — although he’s not notified his followers that this is the case. The Federal Bureau of Prisons proposed criminalizing this act and is considering making it a high-risk violation alongside fighting and damaging property.

It proposed to ban ‘accessing, using, or maintaining social media, or directing others to establish or maintain social media accounts on the inmate’s behalf.’

Read more: Ryan Salame gets longer prison sentence than CZ

Someone may have even hacked into his account, an act that happens too often on X. There may even be an electronic device, such as a computer or tablet, already on-site that he could’ve logged onto.

Zhao’s last tweet congratulated Binance’s current CEO Richard Teng on a pizza he made for Bitcoin Pizza Day. He’s scheduled to be released on September 29.