Can I instal viber on an iphone4

[iMore Question]

Not sure whether this old iphone will support viber

 

[Tartarus]

Just try it out.
Viber has been out for quite some time and I expect them to have an old version available for older devices/iOS versions.

 

[SwitchBeach]

No. You cannot. Viber requires iOS 8. The iPhone 4 doesn't not support iOS 8.