Updating 4 2 version on iphone 3gs
Just bear in mind that a lot of the time it isn't possible even then.Look in Library/i Tunes and select the Software Updates folder for your device. I've tried to search on what else I can do, but cannot figure it out. I have i OS 6.1.6 and if I want to download "Find My i Phone", it requires i OS 7.That sounds a bit awkward, so here's an example: I have a 4th-gen i Pod. At one point I installed various Apple apps like Find My Phone/Friends.
You can also restore the software, which puts i Phone or i Pod touch back to its factory condition.
This is a long shot, and fiddly, so you may want to skip this.
But if you change your mind and want to downgrade to the previous version, this will be easier if you make sure you've saved a copy.
She had, naturally, no apps in her new account so she cannot install Find My Friends.
I used my i Tunes account to install Find My Friends and was able to get the last compatible version for my/her device.