Twitter's website and app continued to work in Nigeria's capital Abuja and commercial hub Lagos on Friday.
On Wednesday, the US tech firm said Buhari's post threatening to punish groups blamed for attacks on government buildings had violated Twitter's "abusive behaviour" policy.
In April, the information minister reacted angrily when Twitter chose neighbouring Ghana for its first African office. He said the company had been influenced by media misrepresentations of Nigeria, including reports of crackdowns on protests last year.
Demonstrators calling for police reform had used social media to organise, raise money and share alleged proof of police harassment. Twitter's chief executive, Jack Dorsey, tweeted to encourage his followers to donate.
In the protests' wake, Mohammed called for "some form of regulation" on social media to combat "fake news".
A spokesperson for Airtel, one of Nigeria's largest mobile carriers, on Friday declined to say whether the company had received any government directives about the suspension.
MTN, the largest mobile carrier, did not respond to calls and a message seeking comment.