How do I change a number in my contacts on the Samsung Galaxy Centura?

This may depend on the contact app you are using on your phone. But I suggest trying this out: Go to Contacts > Tap the box next to the name of the contact you want to edit > a window pops up, top the upper part of that window > press menu key (left soft touch key) > tap Edit

Please let me know if that works for you.

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