I use a Windows Phone and i dont find it lacking like the haters make it out to be . It's similar to iphone and like i've always said, if you want your phone to do everything, you basically want a minicomputer get android
1. No true multitasking - apps are frozen in the background.
similar to iphone , saves battery, much better battery life than android anyday, it has been done for a reason
it's actually better than iphone as some background tasks are allowed, so it's not completely frozen but it's not true multitaking
5. Only support up to 16GB storage .
not true, supports 32 gb e.g. samsung focus
7. Need Zune to transfer files. Zune will only transfer photos, videos & music. All other files need to email/upload to yourself.
again similar to iphone, but here it is lacking
9. Limited to 800x480 resolution.
it's for a reason, if you want HD screen , buy other phones, this is not a flaw
10. No wi-fi hotspot.
again, False. I use wifi hotspot everyday
11. Cannot use any MP3 file as ringtone except those with strict constraints.
oh please... 
12. Cannot set static IP address so no connection to ad-hoc networks.
how many people use static ip in ad-hoc networks, it's rare ... but it's definitely a negative
15. Totally closed OS, cannot sideload apps outside MS Marketplace.
and why is this an issue, so that you can easily install pirated apk's like android
19. No centralized notification page.
this is a flaw
20. Alarm clock cannot work when phone is turned off. All Nokia Symbian and Meego phones can do this.
a big flaw
21. The idle screen is completely blank and cannot display time or notifications.
this is to save battery
24. Cannot stream audio from video to Bluetooth devices (No A2DP).
again false, i've used bluetooth headsets
26. Cannot use Bluetooth keyboard.
i mean seriously... get a computer
29. Ugly 2D flat interface. Oversized fonts for headings treat you like an idiot.
this is just being petty
i wont comment on other issues.. not worth it
USABILITY ISSUES
30. No always visible status bar for battery life, signal strength, carrier, 2G/3G wi-fi, Bluetooth on.
it's a design philosophy, minimalist design.. come on
31. Taskmanager has no option to shut down apps you don’t want running in the background.
you don't need to shut down apps on a WP... when will people get this?
32. Search and Back button cannot be de-activated in apps or games and easily touched by accident which interrupt your user experience.
oh FFS... this is being too picky
33. Lockscreen need to be activated to show missed call/sms notification.
no
34. No way to close an app except pressing back button all the way to the first screen.
again same answer
35. Tiny fonts in messages is very hard to read for those over 45.
true, for people with specs, but it is still manageable
36. Cannot edit playlist or create new playlists from phone.
which idiot has written this? does he even know how to use a WP?
37. Cannot delete a song from phone.
what? kuch bhi..
38. Cannot search your music collection on the phone.
it's easy to find songs, just use the phone you'll know..
39. Cannot close music player, can only pause. Music player on lockscreen will stay until you reboot.
what is the problem.. i'm sure this has been written by a hater..
40. No progress bar for current track playing and no indication which track in an album is playing
41. Cannot lock screen orientation.
42. Online and phone contacts are mixed together with no ability to filter.
again false
43. Cumbersome dialing with no smartdial. No way to create a ‘Favourites’ list of phone contacts
false again
44. Cannot save draft sms messages.
45. Call history only show phone number type. If a contact has multiple phone nos. for a type the number used is unknown.
False again
46. Cannot recognize phone numbers in sms or email to save or use as calling number.
false again
47. Text messages can only be deleted one by one.
the whole thread can be deleted
48. Cannot select multiple pictures for deleting, sending or uploading. They must be done one at a time.
true
49. Notification for recurring events is only given once and none thereafter.
pin the app to start screen , you'll always see the notification
50. Apps are listed alphabetically with no way to group by category. Can be hard to find if you don’t remember the name.
true
51. Calendar scheduler has no weekly view and monthly view is non-zoomable.
true
52. No peak/off-peak scheduling for email downloads.
53. If both wi-fi and data connection are available which one it chooses to use is unpredictable. User experiences don’t agree with Microsoft that it “typically” choose wi-fi over 3G.
cant comment on last two, no experience
FEATURE LIMITATIONS
54. No video call.
are you serious? it's their
55. No haptic feedback for keyboard.
56. No Swype.
you dont need it, just use a WP keyboard
57. No flashplayer support.
yeah i can see the flash support of android, iphone does not have it too.. and flash on mobile is dying , so lame point
58. No support for Java apps.
59. No call recording or app to do it.
60. No call blocking or app to do it.
lol, what crap? my x-gf's blocked 
61. No screenshots or app to do it.
62. No auto wallpaper changer and no app to do it.
now this is stupid..
63. Totally locked down os means apps which interact directly with hardware not allowed.
which makes the OS so stable and smooth..
64. No equalizer for Zune music player.
htc gives an equalizer app, it depends on the phone manufacturer
65. FM radio doesn’t work on speaker.
66. IE browser has no text reflow, no download capability and no offline reading.
67. No 3rd party browsers allowed except those based on IE.
68. No built-in pdf file reader, need to buy app.
lol... false again
69. Cannot open zip or rar files received as email attachment.
70. Cannot send or receive video by MMS.
who uses mms nowadays, email it
71. Office Mobile has much less features than 3rd party Office editors like SmartOffice, QuickOffice and Polaris. Shame on you, Microsoft!
true
72. No native Google maps and Bing maps is useless for most countries outside U.S.
it's a lot improved now.. gmaps is available on WP
73. Email time stamp does not show the year.
74. Wide difference in apps availability in different markets and users locked to one market.
not a wide differnece
75. Not all Bing features available outside U.S.
they will be when they are ready, and alternatives are available for all bing features
DUMB AND DUMBER
76. One volume control for all functions including media playback, ringtones, alarms, notifications.
true
77. Wi-fi disconnects when screen sleeps. Too bad if you are in the middle of a download.
it does not
78. If you receive a text message when talking on the phone an audio alert will blast your ear at the full volume set. All other phones will give a soft beep.
again not trues.. it's not full volume
79. Can only enter one mobile phone no. for each contact. Mobile nos. entered in other fields will not accept sms.
there's a workaround
80. Cannot send/receive MMS without enabling 3G data connection. MMS does not use 3G data.
81. Phone cannot be charged when off.
just put the phone in flight mode, and it will charge like a switched off phone
82. Need to be plugged in to wall charger to sync wirelessly (a funny definition of wireless).
83. Volume up/down buttons cannot operate when screen is off.
man... this dude is just saying crap after crap.. it's false
84. Phone will wake up and display sms content on lockscreen when locked – a privacy violation.
omg!
85. Phone can be rebooted without unlocking to bypass security lock.
FEATURES EVEN DUMB PHONES HAVE BUT WP7.5 DOESN’T
86. No bluetooth file transfer.
iphone
87. Cannot handle USSD codes necessary for prepaid users to obtain services.
true
88. Cannot save new contacts from call history.
false again
89. Cannot sms contacts from call history.
false again
90. Cannot show call duration in call history.
true, but do you really need it?
91. Cannot delete individual calls in call history.
false again
92. Call history does not group calls by contact.
design philosophy
93. Call history does not show the time of call for calls older than current day.
false again
94. Cannot set custom sounds for different types of notifications.
95. No ringer profiles.
96. No silent option (no vibrate and no ring).
97. Cannot send/receive contact as a csv file.
true
98. Cannot backup sms to PC.
99. Cannot save contact to SIM card.
100. Cannot change alarm ring tone or use a MP3 file.
true
This post was by a hater, who did not research properly, and was blinded by his M$oft hate i guess
more than half of it is false , and rest are petty issues , except a few
if you want a smooth lag free experience with good battery life, use WP without any biases, you'll enjoy it. I did.
And if the few missing features are important to you , don't buy WP
but dont spread FUD
my observation is that , people (esp Nokia fanboys) wants WP to succeed and don't care about Microsoft's attachment to the company. But now that it runs MS OS , suddenly they became MS supporters. I have few such people on my twitter TL 
