@frozzbyte
For my case, running CallerID Fix 2.2 does not solve my problem which is
"incoming call will show name but SMS will not".. It is only solved after changing all my contacts phone format to +60..

Installing CallerID 2.2 did fix my problem at least. I'm sorry to all for causing a lot of confusion.

1. I've try the change default.plist fix by frank8, the problem still occur in SMS if I'm saving the number with 01x and I receive the sms by +601x (Celcom)
2. So to all, the change for default.plist Didn't solve my problem!!
3. The region format is all about this fix. The region will set the default for
     1. phonenumber format and fix
     2. default measurement in Google Maps. (still using Miles)

The one that TS show with the terminal and erica utilities is just to put Malaysia as the default region setting (which still does not change and follow US settings). actually if you just install the Erica utitlies and not run the command through mobile terminal, it will not change anything.

? How to run command in Mobile terminal ?
Just type below command inside mobile terminal
/usr/bin/plutil -s AppleLocale -v my_MY /var/mobile/Library/Preferences/.GlobalPreferences.plist

It will not break your iPhone as far as I know. It just change the localization setting to Malaysia and that will fix my problem and I hope everyone else. I still think this tutorial is far easier than SSH and upload the default.plist to the require folder. Maybe I'm not to good explaining it.

Thank you.