In Safari address bar, type http://[phone number].tel.qlnk.net
A pop up appears. Tap on Cancel.
Tap on the share icon in bottom bar.
Share screen appears. Tap on Add to Home Screen.
Give a name to the contact, press Add on top right corner...
And voila, an icon appears on your home screen! You can have as many as you want.
Tapping on the icon will open Safari and ask you to Call or Cancel.
Choosing Call will make a call.