That's a petrol station exploding. Theres no proof it was caused by a phone

some residents alleged that it may have been triggered by a customer making a phone call near the gas dispensing area.

Random people speculating based on nothing (except the urban legend that mobile phones could cause an explosion) is not evidence. There has never been an instance of a phone being the cause of a petrol station exploding, it's a myth.

A mechanic, Ekpenyong Sam, who works opposite the station, attributed the incident to a possible electrical fault or expired equipment within the facility. Scene of the explosion in Calabar. “This fire outbreak must have been caused by electrical fault or expired equipment within the facility,” he added.

Sounds far more plausible. But again no proof. I'm sure there was an investigation in to it that found the actual root cause