Hello EveFo!
Welcome to The Canon Forums, and thank you for your inquiry!
For assistance with connecting your PowerShot SX710 HS to your computer please follow the steps here: http://Canon.us/un4p For steps on how to connect your camera to your Iphone please go to the following link: http://Canon.us/gbbu
If you try this and are still having trouble, we suggest reaching out to Canon in your country. Please click CONTACT US and choose your region.
We hope this information was helpful!