Messages show phone number not contact name - Samsung GT-P6200 Galaxy Tab 7.0 Plus 16GB, 3G, 3MP, 1.2GHz dual-core, 3.2 Honeycomb 7-Inch Unlocked World Tablet PC Black

This problem has been seen when there are two numbers saved with the same name or there are two names saved with two different numbers so it makes your phone confused to show the name of number from which you have got message or call. I suggest you to check that is there any duplicate entries. I was having the same issue on my phone when there was a number saved with the two different names so my phone was just showing only number. Also you might have duplicate contacts for that number.

Probably you have multiple names on the same number in your contacts due to storing contact number more than once, truncation, etc. Use Search Tool facility in Office, search contacts using the number you have problem with. If it found multiple names, choose one you like and delete all the others.

this is because you have a duplicate contact name in your phone book.. if you have different contact name in your phone book with same number.. only the number will show up...

Try to copy the contacts to your phone memory.

If only one number is not showing on your screen it means that you have blocked it with your application or messaging system that you'll need to take the number out of the blocking list. But if this doesn't help you the number itself might have a privacy feature that you cannot see the number itself but just showing private number.

go to ur message settings and set the phone caller id on and press ok after some time when any message come from ur contact numbers it will show or it is unkonwn number means it will not shown

try entering the (+) plus sign and the country code then the mobile number / editing the numbers of your contacts. such as, a mobile number alone (depending on the sim) that reads as 09178943874 must be edited as +639178943874 (noting that +63 is the country code).

No duplicates in there if there is more than one number attached to more than one name the nokia refuses to show caller name, cheak phonebook to make sure there is one number to one name only

Select Menu > Contacts > Settings and from the available
options:
Contacts view—To select how the names and phone numbers
are shown.
When you view the Details of a contact with
Contacts view set to Name list or Name only.

same problem :( grr!!