HELP! I LOST many apps after reinstalled the 10.2.1 OS

Question

My phone is Z10, and the previous carrier is O2. (now I already unlocked it). Yesterday, I post an message about my phone 's problem, today I did , but after I reinstalled the 10.2.1 OS. Something happened.  Please take a look and help me .
1. The starting windows image is changed (not China unicom or ).\ feels  a little bit slower than before,
2. I lost many apps, the voice control、twitter、 youtube、music etc. Now my phone only have one page of apps( should be three page of apps). And the monitor doesn't  have reaction when I tapped it.
3.when I recover my back-up, I found out only those apps from BBW or original apps recovered, the others not.
 So what should I do now? I have tried twice to reinstall OS.   

Answer 1

Based on the screenshot you didn't follow my instructions in the other thread and reinstall the OS using BB Link.  You installed a developer version of the OS that you downloaded from somewhere that is incomplete.  Please do the following if you're not using Link to install the OS officially:
1. Connect your device to your PC and make a full backup with BB Link (if you don't already have a backup.)
2. Download the correct autoloader for your device from the first post in the thread linked below. You need to know your full model number (i.e. STL100-1 (or -2, -3, -4) which can be found in Settings >About. Make sure you download the one for your model that contains the radio file. There is another crackberry thread that contains a newer radio file that you can load once you're all done if you want to have the latest and greatest. The process for loading a radio file is the same as this process but no need for backup/restore.
10.2.1.1925 OS: http://forums.crackberry.com/bb10-leaked-beta-os-f395/lengend-presents-10-2-1-1925-all-q-z-887047/
10.2.1.1926 Radio: http://forums.crackberry.com/bb10-leaked-beta-os-f395/1926-radio-q10-5-z10-1-2-3-4-z30-891107/?highl... (load this the same way after the OS above has been loaded.)
You will need to unzip the downloaded file from above before you can run it. If you don't have an unzipping application on your computer you can download 7Zip from here: http://www.7-zip.org/download.html
Close BB Link and leave the device connected.
Double click on the autoloader you downloaded.
The process should take around 5 minutes or so. when it's done, you'll need to complete the startup process before you can connect to Link and restore data.
When you're done you can restore your backup, though I recommend NOT restoring your Settings backup as it's best to start clean with this new OS but it's up to you. You may experience small bugs here and there from restoring the Settings portion of the backup. Media and Application data seem to be OK to restore.
This will install the correct version that has all the apps you're missing.
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