Learn how to say Redial correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word redial:
verb (redials, redialling, redialled; US redials, redialing, redialed)
dial (a telephone number) again:
you can redial the last number called
(also last number redial) the facility on a telephone by which the number just dialled may be automatically redialled by pressing a single button:
features include redial and ringer volume control