I read this somewhere else and tried it myself. It works for me, so I want to share it woth you guys.
I went into settings>>wireless and networkds>>mobile networks>>Access point names. Clicked menu and new APN. I created a new APN and named first 2 fields with Blank.
Now I can select it, when I am not in Wifi area...and I dont want to use 3G. If i want to use 3g, i just select the default ATT WAP APN and its starts automatically.
Also, when switching back to APN named Blank, I have to reset my mobile network. for that, I go to flight mode and back to normal.
I am able to save my 3g leakage and battery drainage cause by 3g using this tip. Juice defender is great for its price..but if i can do it for free, why to pay $$
.
Please try it and tell me if i am missing anything here and feedbacks
I went into settings>>wireless and networkds>>mobile networks>>Access point names. Clicked menu and new APN. I created a new APN and named first 2 fields with Blank.
Now I can select it, when I am not in Wifi area...and I dont want to use 3G. If i want to use 3g, i just select the default ATT WAP APN and its starts automatically.
Also, when switching back to APN named Blank, I have to reset my mobile network. for that, I go to flight mode and back to normal.
I am able to save my 3g leakage and battery drainage cause by 3g using this tip. Juice defender is great for its price..but if i can do it for free, why to pay $$

Please try it and tell me if i am missing anything here and feedbacks
