Lost all messages, message app is blank after installing IOS8.3

Question

Hi I updated my iPhone 5s to IOS8.3 yesterday. Once the update was completed, my iMessage is blank, i.e. the screen turns blank after I click on the message icon.  I had about 2300 un-read text before the install. That number still shows on the icon.  When I click it, my screen becomes blank (except the cell phone / wifi reception beacon and battery on top). The rest is entirely blank. After a while, the app would close and go back to home screen. It feel like the app tries to load my messages, but fails.  I tried the followings things after reading online posts:
reset network settings - did nothing
reset settings - did something. my phone seems to start receiving text messages. I saw notices, but the app remains blank when clicked. my phone just vibrates every couple of minutes, like it's receiving messages
turn off imessage - did something. Once, I saw all my message came back. When I tried to reply to a text, the app closed itself. When I click to open again, the app become blank
Restore to factory settings - did nothing to messages
I'm now restoring it to a New Phone - wish me luck

Answer 1

HI minaqva,
Sometimes a problem with Thunderbird may be a result of malware installed on your computer, that you may not be aware of.
You can try these free programs to scan for malware, which work with your existing antivirus software:
* [http://www.microsoft.com/security/scanner/default.aspx Microsoft Safety Scanner]
* [http://www.malwarebytes.org/products/malwarebytes_free/ MalwareBytes' Anti-Malware]
* [http://support.kaspersky.com/faq/?qid=208283363 TDSSKiller - AntiRootkit Utility]
* [http://www.surfright.nl/en/hitmanpro/ Hitman Pro]
* [http://www.eset.com/us/online-scanner/ ESET Online Scanner]
[http://windows.microsoft.com/MSE Microsoft Security Essentials] is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.
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