In Lumia 520 Windows 10 bugs list.
1.Main Screen:- Clander show Tommatow:All insteda of Tommatow:All Days
2.Phone shortcut:- choose caller id app say none even i have true caller.letest.History of call log when click on contect details of incoming and outgoing call it take time.5 sec to load all details.same for edit new and link contect.
3.Messeging:- Works Fine.but when we go from messeging setting it sent to older setting instead of windows
4.Photo App:- i have a lots of photo but there is no option to short photo or view photo by date.in windows 8 we can select march then it show popup of month to view directly photo of that month.loading time is high.display white photo then load photo.album is not there.
5. Timer is not edited mange option do nothing.
6.Battery Saver Usages:- Don't say any app.how to disable background app.
7.Calculator:- Changing calc take some time.have to press two or more time.properly.
8.Camera: After taking photo view photo take time.2nd when take photo camera show bright photo after taking photo image's brightness decress.
9.Start Button didn't function properly.have to press2-5 times to work.
10.After Restart phone or turn on it say not for Resale in red color. Take lots of time to turn on.aroung 60 to 180 sec.
11.Data Sense: Show some app with name uninstalled application
12.File explorer:- short by is just on top we have to reach top to short file.
13.Facebook is not open
14.Games: Load time is 2-3 min.
15.Here Drive, Here Map not open show black scrren and closed automatically
16.Charging: Full charge notification remove from bettery on top of scren.
17.Insider hub not open.
18.Two setting is there one is old and 2nd is windows 10 setting menu
19.Setting
20.System:->Display:- In 100% brightness level brightness is less then windows 8.1 compare.
21. Notification+Action center: scale problem only show Notification + a .one app show black scrren in it and zMessaging Splash is there what is that?
22.Phone:- My Phone Number Blank How to Add.After Voicemail no what is box for ON and OFF.
23.Messeging:- Download messege from TextBox is Very Small.and when change it app close.Some time.
24.Speach:- Add a Language show nothing
25.Storage sense: No bugs
26.Battery Sever: Show 3 hours when if is fully charged.When Click bettery usage setting menu close.But if you select from app list it show 13 hours.but bettery sever from app list no option to disable background app cause no app shown.
27.Driving mode i never use.so i dont know about it.
28.Maps:- There is no map still it say your map is update.Automatically Update Maps and Metered Connection button is diabled even i use wifi.
29.Find My Phone:- Sign in to MSA Click Do nothing.
30.Photos & Camera: press and hold the camera button to wake up is on and prevent ..... option is off /on but after lock the phone camera button dosent wake up phone.
31.About:- IN Windows 10 menu and older menu show diffrent information.
Normal Menu Windows 10 menu
Name
Parimal Denim
Parimal Denim
Model
Nokia Lumia 520
Nokia
Software
Windows 10 tp for phones
Windows 10 tp for phones
Os Version
10052.12534
10.0.12534.59
Firmware RN
3058.50000.1425.0001
3058.50000.1425.0001
Hardware RN
1.5.0.1
1.5.0.1
Radio SV
2.0,242037.8
2.0,242037.8
Chip SOC V
8227
8227
Scrren Resolution
480x800
480x800
MAC Address
No Need to Display Here
No Need to Display Here
Meid:
IMEI
*******52585869
*******51585869
Sim ID
No Need to Display Here No Need to Display Here
IMS
not Register
not Register
About:- Help Contacts,Online Conent press do nothing in windows 10
32.Devices:- Bluetooth : Unable to send file from pc to phone.
33.Netowork And Wireless :-
Wifi:- Always wifi ON after phone Restart.everytime we have to off the WiFi
34.Flight Mode:Work
35.Mobile + Sim: Work
36.Data Sense : Work but load time
37.Internet Sharing: When Click Close app.and go back to start scrren.
Personalization
38.BackGround:-Choose Background pic always fails.
Sound:Work
39.Lock Scrren:When Click Choose your Background theme change to white from black and cant see properly any thing.
40.Theme:- Problem in White Theme Some of content missing from setting.
Accounts: Work
Time & Languages:-
41.Date & Time:- 24-hour Clock off will reflect after phone restart.
42.Ease Of Access:
Closed Captioning

on't Understand what is that.
43.Privecy: Two Feedback option is given one is working and 2nd is not working.
44.Feedback:- send feedback button is disable.
45.Camera: If you disable let app use my camera then it will stop working camera.
Speech,inkin,& Typing :Can't understand what is it?
46.Update & Backup: Change OneDrive Backup setting dont work.phone hang and close the app.
47.Extras:-
Access Point:- Hide all ap then again show.when open and close
48.Device Hub: not working on windows 10 menu but work in normal menu
Display:
49.Extra info: show Lumia Cyan on windows 10 menu load time,In Normal Menu cant open sometime.restart phone.
50.Restart Phone: When Restart phone shut down time we can see wrong scalling and to turn phone on have to wait 2-3 min.when turn on say not for Resacle in red font.and have to press 15-30 time to turn on phone.
51.Theme:white theme can't display some content
So At Last When i Check My Compete Phone i found one another problem is that after check all my current running app is more then 15-25.
So windows 10 if full of bugs and error but main is Calling error that unable to cut phone or we can say cant use phone untill phone cut.by other party.