I have applied for neet 2019 through mobile browser,but I got confirmation letter from nta,can I face any problems in future regarding with.

as long as you have got the confirmation letter you don't need to worry about whether you fill up your form using a mobile application or not since you are a verified candidate and shall be receiving your admit card on time and will be eligible to sit in the examination and on qualifying it you should also be easily going through your verification and counselling procedure is which will not be a problem at all

Hello Puneeth

Dear.. if you've got the confirmation letter.. then there won't be any issues. So, don't worry. But still to be on the safe side, do take the print out of the confirmation letter as hard copy document + for the soft copy document save it in different drives coz you never know.. when such need arises.. so it should be there with you.

Hope this helps.!
Good Luck.!