With clear sky a-gps can sometimes takes from 3 sec to 30 sec or sometimes cant even lock due to obstacle blocking from getting a good reception

Menu > app > location >  Positioning > Positioning methods > make sure the word Assisted GPS is untick. Only Integrated GPS is tick

well well screen protector..
my way of applying is different comparing to most of you all.
i apply using the way how ppl apply car tint film.
prepare some dish washing liquid in a bowl mix with water.
remove the SP and deep the SP into the bowl then place it on ur phone screen.
next, use a credit card or ruler to push out the soapy water from ur screen. (pls prepare some tissue to clean up the soapy water)

for me , this is the best way to apply SP. ask shop do...15 mins di still got bubble on my screen. sendiri do at home...no bubble at all and itz fast.