Hi my phone does not want to take MTN SIM card so I want to know how much to unlock network? From iPhone 7

You will need to contact the cellular carrier that this iPhone is "locked" with to have them assist you with getting it unlocked.

Ref: How to unlock your iPhone for use with a different carrier - Apple Support

avuziwe Said:

"Hi my phone does not want to take MTN SIM card so I want to know how much to unlock network? From iPhone 7 how much to unlock network for iphone7"

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Whom to Contact:

Contact your Carrier, as they provide you with the SIM card and its configurations.