Why does my iphone dials multiple numbers at the same time
I have iOS 8.4.1 on my iPhone 6. I have restored my phone, re-set it to factory default at the direction of Apple Care professionals on three occasions. However, (the phone) without touching it, continues to dials numbers, sends numbers and symbols during a conversation or when entering an extension. The text keyboard is not visible in contacts. When in use the phone keyboard will be overlapped by the text keyboard. Is there a solution or a method to fix it myself?
iPhone 6, iOS 8.4.1