Check brightness at max level, touch responsiveness at the edges, colour accuracy (whites should be white, not bluish), viewing angles, and the price — if a ‘premium’ display costs half the market rate, it’s almost certainly a copy.
Test brightness, edge touch, colour accuracy and viewing angles as described above.
They can cause higher battery drain and touch issues, and they fail sooner — costing you twice.
Yes — a transparent shop always returns the old part. We do.
Walk into our Nandgram shop — free diagnosis, upfront price, most repairs same day.