This was disclosed by the Registrar Prof Ishaq Oloyede

According to our correspondents, they disclosed that the agents are more than ready to conduct the scheduled mock examination for willing applicants to test-run the efficiency of the 600 Computer Based Test Center it approved for this year’s examination.

The date for conduct of the mock exam, which is voluntary for all registered JAMB applicants, according to officials, would be announced anytime this week.

JAMB has said it postponed the scheduled Mock Examination penultimate week, owing to technical hitches it encountered along the line, and more importantly to allow willing applicants who were yet to register as at then, partake in the test-run examination.
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NOTE: that Jamb Mock Exam is Still valid
Source: http://academyhint.com