51? functions of a cellular phone

A cellular or mobile phone, a MULTIFUNCTIONAL electronic device, is or may be used as :
(not all of the phones have all of the functions listed below)

1 cordless phone that operates through airwaves

2 radio transmitter
3 radio receiver

4 computer (to browse the internet, send and receive electronic mails, chat...)

5 virtual arcade/virtual casino

6 electronic typewriter

7 word processor
8 viewer of texts
9 issuer/sender of texts (messages)
10 receiver of texts (messages)
11 texts' archive/file or repository/manager of texts (messages)

12 photographic camera
13 viewer of photographs/images
14 issuer/sender of photographs
15 receiver of photographs
16 photographs' file/repository/manager of photos

17 video camera
18 video player
19 video sender/issuer
20 video receiver
21 videorecorder, camcorder/video repository/manager of videos

22 audio recorder/recorder of sounds/phonograms or sonograms
23 audio player
24 issuer/sender of audio archives
25 receiver of audio archives
26 audio archive/repository/manager of phonograms or sound files

27 operator/runner of applications*
*for example, a cell phone can support blood pressure monitors —having previously downloaded the appropriate application
http://www.consumerreports.org/cro/news/2012/03/new-blood-pressure-monitors-work-with-your-cell-phone/index.htm

28 television set, to watch television online
http://electronicdesign.com/blog/how-watch-tv-your-cell-phone (an April 6, 2013 newspaper article).

29 clock
30 alarm/wake alarm 
31 stopwatch
32 timer is a rememberer, which remembers you of how many minutes left for anything (exempli gratia, cooking);
—Now, independent timers (not integrated into cell phones) can be integrated into conventional ovens, microwave ovens, washers, dryers; also, they can be used as simulators of human presence, allowing an electronic device (such as a radio receiver or a light) remains lit, to prevent theft

33 calendar

34 calculator

35 lamp

36 phone book, directory (contacts)
37 schedule of tasks
38 log
39 converter (sometimes automatic) of currency by multiplication and division according to the exchange rates
40 converter (sometimes automatic) of temperature scales
41 control for electronic devices (television set, video player, refrigerator, microwave oven... ), for example, to switch channels when watching television

42 document/image/picture scanner
43 fax
http://home.howstuffworks.com/scan-fax-using-camera-phone.htm

44 barcode reader
45 dot matrix or two-dimensional barcodes' reader, QR, Quick Response
46 geolocator

47 buzzer/vibrator

48 compass
http://en.wikipedia.org/wiki/Compass
in the caption below the second picture the Wikipedian file quoted immediately above, you can read: "A smartphone that can be used as a compass because of the magnetometer inside"

49 translator
50 interpreter

51 secretary: sometimes, a cell phone can replace a human secretary, just when anyone is using an intelligent personal assistant, such as:

Braina;
Apple’s Siri;
Microsoft Cortana;
Google Now;
Amazon Echo;
LG's Voice Mate;
Microsoft Cortana;
Samsung's S Voice;
HTC's Hidi;
SILVIA.

—

To know the IMEI (International Mobile Equipment Identity*) of any mobile or cellular phone, and other electronic devices:

*Sometimes: International Mobile Station Equipment Identity.

Press *#06#   ... and hey presto!

Asterisk, number sign,* zero, six, number sign.

*or pound symbol, or noughts-and-crosses sign, or tic-tac-toe sign


Write down the 15-digit IMEI number of your electronic device, and keep the piece of paper in your closet, or in a drawer of your desk,  ... or send it to yourself, to your e-mail address. One or both of these measures will prove to be useful when notifying the telephone company so that they can disable your device in case it is stolen.

The IMEI number is a 15-digit one, a unique number assigned to a mobile.


Sometimes, the acronym SVN (software version number) also appears, followed by a two-digit number.


—

Added on purpose (not a mistake):

Synonyms for...:

archive
attic
cabinet
cellar
closet
cupboard
registry
repository
store
warehouse