Only 3 fingerprints are available to add

[SSG]

In other phones we have option to add 5 fingerprints but in M30s we have only 3.

[RP5054]

3 is sufficient. why u need 5 ?

[andresussu]

i am ambidextrous and like to use the index or the thumb for unlock...then 4 would be ideal in my case.

[bartuela]

This was not the question. There are many reasons to have more than three fingerprints recorded. For example when I'm  trekking I need the left and right thumb while when I'm typing at the pc keyboard I need the left index. In other cases right thumb is best used.

[geevarghese]

all budget Samsung phones has same issue, not sure about higher end Samsung phones

[Sidhabhi]

4..

[Prathameshvankar]

Samsung Galaxy A50 too has 3 options

[vicky2001]

the less is better..if there is more, then there will be some issues

[amanjalwehra]

Bro you can add mor than 3. ..simple method while registering one...register two fingers and both will work perfectly

[Oren27]

Thanks a lot man! It worked. 3 is enough but i want to add more fingerprints. So that i can unlock with other fingers.