Solution for MTK devices vulnerable by SMS hack

I read this in one post,
 

A new discovery by blogger Korben suggests that many MediaTek-basedAndroid phones are susceptible to the strangest of hacks. All it takes to remotely reboot some unlucky user's phone is to text them the symbol '='. In MediaTek chipset language, this symbol apparently equals "shutdown and reboot". Check the video - Korben demonstrates vulnerability

If you are unfortunate enough to get spammed with exploitative messages, you could have your phone rendered unusable.

Some popular Alcatel handsets, such as the One Touch Idol X, Idol Ultra, 997D, Pop C3, S-Pop, and Star, have been confirmed as vulnerable. To find out whether your MediaTek-based phone gets lured by the trick, text yourself '=' without the quotes. If you end up rebooting, fear not - simply change your default messaging app to something other than the default one.

Hopefully the flaw doesn't end up bigger than what it currently is, otherwise hackers will have a field day with the majority of Chinese phones.

 Solution : For 4.4 android KK version it is simple. Just go to settings and change default app.

But for older version, you need to install a messaging app which doesn't have functionality similar to the default app. e.g. 8sms  won't work, but chomp sms will. And then go to settings and then All apps and disable the default app. Profit !!