Guide with all the steps necessary for you to change the components of the Nokia 4.2 (TA-1150 / TA-1157) yourself.
We will apply heat to the back cover with a thermal mat (about 75ºC for about 3-4min) to soften the adhesive that holds it, and with the help of a fine enough tool we will make a hole to insert one or more plastic spikes and thus We will not risk damaging the case.
With the pick we take off the case around the edge of the phone and extract it, taking care with the fingerprint reader that is connected to the motherboard.