Samsung Galaxy: how to lock 3G only (and benefits)

How to change Samsung Galaxy to 3G only.
Samsung Galaxy to a 3G signal, what are the benefits? Of course, browsing through the Android will be faster

If you really want to always be online with the setting signal 3G/WCDMA (though certainly it would be wasteful batteries), consider the following tips for Samsung Galaxy:
-Enter the area Dialer (to call), type * # * # 2263 # * # *.

It will display a menu of options Automatic, Preference Band WCDMA, and GSM Band Preference.

If seen, the default menu is automatic with a # in tow.

If you want to use only 3G networks, select WCDMA Preference then selects WCDMA All.

Then automatically Galaxy will only accept signal 3G/WCDMA alone.

When you want to change the setting to automatic network / gsm only, repeat the above steps.

Now Samsung Galaxy You will only use the 3G signal, so browsing through the Android will be faster. Only the batteries will be quick out because the process of finding a 3G signals. But its worth, especially if the Galaxy Mini is used also as a modem.