What is the average number of contacts (names, phone numbers, emails,
etc...) in a users cellular phone.  I will need as many statistics
relating to this topic as possible.  The answer will look something
like: The average cell phone user has 50 numbers, etc..- Any kind of
study/statistics would be helpful

57

Greetings,

Firstly, just seeking a clarification. You mean the number of contacts
that can be saved in phone and NOT in SIM. If it's SIM storage that
you are looking for, it depends upon the memory of your SIM card.
Usually
16K - 125 phone numbers with names
32K - 250 phone numbers with names
and so on

Assuming, we are talking about contacts storage in phones. In this
scenario again, there are 2 kind of phones
a. leverage Shared Memory of Contacts.
b. with Dedicated emomry of Contacts

*Shared Memory* - You can save as many as your phone has shared memory
storage. Even in worst case scenrario you can easily store more than
500 contacts with phone numbers, email, house number, address etc.
It's like complete diary.
I have seen shared memories from 4MB(Nokia Ngage) to 80 MB (Sony Ericson P990)

*Dedicated memory* - Majority (may be 70% market share) of cellphones
can accomodate 250 to 1000 phonebook entries.

Almost 380 phones carries the capability of accomodating 250 entries.
Almost 158 phones carries the capability of accomodating 500 entries.
Almost 148 phones carries the capability of accomodating 1000 entries.

A quick google search will help you establish this fact. 

://www.google.com/search?num=20&hl=en&lr=&ie=ISO-8859-1&as_qdr=all&q=memory+phonebook++%22250+entries%22+site%3Awww.gsmarena.com

://www.google.com/search?num=20&hl=en&lr=&ie=ISO-8859-1&as_qdr=all&q=memory+phonebook++%22500+entries%22+site%3Awww.gsmarena.com

://www.google.com/search?num=20&hl=en&lr=&ie=ISO-8859-1&as_qdr=all&q=memory+phonebook++%221000+entries%22+site%3Awww.gsmarena.com

Almost 7 out of 10 phones are capable of letting the users add
anywhere between 250 to 1000 contacts wth some low end phones
providing less and some high end phones providing more.

If this satisfies your expectations, can i post this as answer?
If you have some question, do let me know.

regards
Navjot Singh

oops missed the point here.

0. Almost 80% people buys low/medium range phones with 250-500 capacity range.
1. Now just going by the normal distribution curve, majority of people
will have address books filled anywhere between 35% to 65%.

We can conclude that most users will have anywhere between 87 on the
lower side to 325 on upper side. However, coming down to a fix numbr
will be very difficult.

HTH
Navjot Singh
PS - I have 197 numbers stored and i am not in Sales/Marketing division.