There are a few steps to go through to achieve what your after, here is a bit of a walk through...
1. Create your list of names and numbers you can place them anywhere, but for this example I'll palce the text "Name" in D1 and in E1 the text "Number" which will be my column headers, then leave an empty row and begin filling in the names and numbers, so you will end up with something looking like this (I've hiden columns A, B & C just so you can see row numbers) -
2. Once the above is complete go View->toolbars->forms, this shows the forms toolbar. Click on combo box icon in the toolbar, and then draw it in on your sheet, anywhere you fancy, maybe over cell A1?
3. Once drawn, right click on it and select format control. The input range is your column with names in so select cells D3 to D5 (you can extend this later as your list grows). For cell link click any cell for the moment I'm using D9, this will be where an index number is placed and will read either 1,2 or 3 depending upon your choice in the drop down, which isn't much use until its translated into a result.
4. You want the result of the drop down shown in A2, so in cell A2 enter the formulae =INDEX(E3:E5, D9) this then shows the phone number relating to the name picked from your list, dependent upon the index value returned in D9 and looks like this -
Thats it done..
When I'm building combo boxes I generally have all the entries on a separate sheet from the combo box to keep things tidy for the user, so all you would see on sheet 1 is the combo box itself and the result.
I have emailed you the example I've built and a development of the above to clean it up a bit, apologies if the above sounds complicated, but if you follow it you should end up with a somewhat cleaner worksheet than using vlookup.
Hope that helps
