It remains

Yes if you follow directions and leads on phone.

Not that I'm aware of. It has a standard cord and wall plug compatible with current one- and two-line phone wall jacks.

Yes IT is .

Although a bit unclear as phrased, I believe you're asking if you can use this phone with a VOIP connector from your VOIP provider? - If so, then the answer is yes.

(I know Vonage works fine with this phone; I've been using this and earlier versions for 15 years or so. I expect other VOIP providers allow similar functionality.)

A remote phone can access the answering machine. TOUCH TONE capability is required. There may be a smart phone app that will generate the proper tones. Since I don't use this capability I am at the limit of my knowledge.

Nope.

YES, OF COURSE. IT WILL WORK WITH ANY PHONE COMPANY IN THE USA. IT'S A WONDERFUL PHONE WITH GREAT FEATURES. THE TILT FEATURE IS ESPECIALLY NICE. SOUND IS CLEAR AND FUNCTIONS ARE EASY TO USE. GOOD HANDBOOK PROVIDED.

I don't believe so.