Assign any contact phone number to a number pad number so you can hold down that number when dialing to quick call that number

Dialed history should have 3 tabs -
Call history | Most frequent called| Favourites.
This would help in filtering required contacts instead of navigating into People app and searching contact to call/msg everytime..

Treat calls like conversations, and collapse them when they are to the same number back to back.

When long-pressing a contact/number at call history have the option to: save-to existing contact, create contact, send sms like 99% of mobile phones.

Filtering the Call History by Outgoing, Incoming, Missed Call (like it was implemented in WM6) and being able to delete just the filtered history entries is what I am missing in Windows Phone.

Call length information should be a priority since the primary function of this device is a phone.

It answers with a short message saying "(myname) saw your call but is unavailable. **** call you back shortly." Then have a five-minute reminder.

If a headset / headphones are connected to a Windows Phone device, phone should still ring through headset / headset.

When you're in a call with headset and start using the phone for secondary activities and your hand gets close to the proximity sensor, it turns off the screen and gets it back to the call screen. Really annoying.

Going to the phone hub should take you directly to the keypad, not to recent calls.

as you enter a phone number have the list of contacts matching the numbers entered displayed which will allow a contact to be selected from the list and also for numbers to be identified with particular contacts as they are entered

It would be really good to be able to filter out calls or block completely

Please create an app that allows you to block certain callers, all old phone have this feature, this is supposed to be a "smart phone" so make it smarter, or Im afraid I willl get an iPhone, and i despise Apple products of all kinds

Create a filter where you have an option to accept White List, block Black List, Block all, Block hidden or Block specific number for calls and text messages as well. This is to prevent outside threats or anyone who does something wicked.

They'll all fit easily. http://imgur.com/8o5o8. It can be frustrating, eg: putting automated phone system on speakerphone, then dialing, then switching back when call is answered.

Maintain a small mapping of area codes to metropolitan area to display caller's general location on incoming call screen when no contacts match.

We should be able to play songs during calls so that receiver can also listen to the song. This is a very basic feature. my girlfriend will be very happy if it was there

When receiving a call, you should be able to see additional information other than just the name of the contact - mainly, their company. I am a business user, have over 500 contacts, most of them assistants and company managers, etc. I need to know which company are they calling from.