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"Mobile data", roaming and APNs... I'm confused.

HornedDemoN

New Member
Hey there.

Before I ask my question - I have a Samsung Galaxy S3 4G LTE (rooted with Framaroot, great tool) with Android 4.1.2. I'm on a prepaid "voucher" plan, which basically gives you a certain amount of money you can spend on calling etc. and when you've used all of it, you have to recharge (buy another voucher with a code, which gives you more money to use on your mobile phone).

Today I made a very stupid mistake. I was using Wi-Fi at home, electricity died, my battery was low. What I did was disable Wi-Fi (through Notifications window) and checked the other settings to see if I can save battery through some other way. I saw this setting called "Mobile data" and I disabled it.

Biggest mistake ever. All my voucher money disappeared in a flash (like literally 1 second after disabling it), I'm actually still not quite sure what happened... Apparently I activated roaming or something? Boy, do I feel stupid...

Anyway, for my plan, this setting is unbelievably dangerous, it seems...


My question
: What do I need to do to prevent this from happening again?

After inspecting the issue further, I learned about the so called "APNs". I have 2 default APNs, which can not be removed or disabled (directly, anyway).

If I delete them, would this block charges when disabling "Mobile data"? If not, what else could I do (besides not going near this setting ever again)?


Thanks for your help in advance.
 
You can easily turn off data roaming.

Settings > Wireless and networks > Mobile networks: Uncheck Data roaming

APN information should not deleted unless you have a specific reason. Removing the APN info will cause you to lose data and MMS.
 
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