Multidevice AVG for MAC.dmg won't open on my new I-Phone

Hi John,

We understand your concern.
Please be noted that we have a dedicated Mobile Support.
I request you to click on the link below and submit the request to our AVG mobile team.
https://support.avg.com/support_contact_form?l=en&retUrl=support_Android_AVG_Antivirus
Our team will contact you via email.
Thank you.

I have downloaded  avg_mac_security...dmg   and have it stored in my folder of my device.    The on-site instructions simpl say  'open the file'     When I try this my device says  "open with ..."    and none of the options available  appears able to open teh file.   The nearest is to try Chrome, ( my OS)  which then replies that it is unable to recognise the file.     How can I open the installation file  from teh file folder on my new I-Phone.. ? 

Hi John,

We understand your concern.
Please be noted that we have a dedicated Mobile Support.
I request you to click on the link below and submit the request to our AVG mobile team.
https://support.avg.com/support_contact_form?l=en&retUrl=support_Android_AVG_Antivirus
Our team will contact you via email.
Thank you.