I bought a new iPhone 7 plus a couple weeks ago. At first, things seemed great. Now not so much...the phone's battery is draining way too fast. I had it fully charged late this morning and I just checked it...it was down to 29%. I don't have bluetooth enabled OR that wi-fi assistant.

The last few calls I've made, I've been able to hear them but they only hear 1 word out of several from me. My brother asked if I was calling from a wind tunnel. My doctor's nurse was not able to get the needed information and I had to call her from my sister's landline. The third thing is that the back of the phone seems too warm, I'd say almost hot. I'd appreciate any ideas and/or suggestions!