Home, overview and back button is not working
Home ., overview and back button of Lyf wind 7 is not working
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How long have you had the phone, as it seems that it is a very new model?
If you have had it less than 12 months I suggest that you consult the warranty statement that came with the documentation for the phone, as to what you have to do to make a claim for a warranty repair or replacement.
If you can't find it here is a link. See paragraphs 4 - 6. to see what you have to do.
Hopefully this is of some help.
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