I have two phones. Both have android OS 4.1.2 installed. Though on one phone it has "Move to SD card" buttons (though some apps have it grayed out), on the other this button does not appear at all. I mounted SD cards on both phones. And the same app would have the button on one phone, not the other.
I have read pages saying android disallowed that at some point. But how come they have it on some apps, not on others?
I loaded Link2SD and use the "move to SD" button there. I got this warning msgs: "Warning: App2SD is not supported by your device. Because your device has a primary external storage which is emulated from the internal storage. you can link the app in order to move its files to your SD card"
I have little idea what it means. this phone only has 1.24GB of internal storage and it quickly drains.
Two models are Huawei Vitria (which can move to SD card) and LG-LS720 (cannot move to SD card)