App not getting installed - Samsung S7

[davidmishra]

I recently just brought my new S7 mobile and I have been trying to install this tutuapp but the apk file doesn't even allowing me to open any help?? How can I install it

[BandOfBrothers]

Can you download the App from the Official PlayStore @davidmishra

I note you mention an "apk file" which sounds to me like your trying to sideload it.

The problems in my opinion with apk files is that they have not been officially checked out for bugs / viruses and from experience do not always work or work properly and have the potential to compromise the phones stability and protocols. I submit many do use that route and feel everything's ok with what they have downloaded from unknown sources. 

[63johnw]

Hi @davidmishra if that's not coming from the play store that could be your problem.

It may be your security settings, try settings, advanced settings, security, then activate unknown sources. 

Be very careful installing anything that isn't from the play store. It may also be that the apk file is corrupted.