Hi, everyone.

I had notice a strange thing. Sometimes my iphone starts showing me full reception bars when i connect it to my JVC audio center. After a minute then it shows me a "normal" no service sign.
Also sometimes i have got a "carrier" menu in Settings and it shows me local networks. I cant connect to those networks. Actually this is nothing new but my notice.

Also do anyone knows what is an icon on a top bar, looks like a phone and a keypad in a right upper corner. I didnt notice it in apple's pdf.

Thanx in advance.

That's the TTY feature (to use devices for hearing impaired)
You can toggle it on&off under Settings/Phone.

tys