I've also been having issues with my Coolpad Legacy. For a couple of weeks now, the messaging (default google app) and calls/contacts will stop working and I will not receive any texts until I restart my phone. The whole time my data works fine. I didn't even realize until someone contacted me on Facebook freaking out because I was not responding to anyone's texts or calls. I've had my phone for about three or four months now and this is basically the first time I'm having any issues with it. I tried talking with a lady at the local boost store and she said I'd just have to buy a new phone. I can't afford that when I just barely paid $150 for this one! I'd appreciate any kind of help with this issue. I live in the middle of nowhere and rely on my phone for everything.
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Mine is using the SD card as internal. It accepted that setting just fine.
However, after 1-3 days without rebooting, it becomes extremely slow, and eventually almost completely unresponsive. I've had it for four months, and it has behaved (misbehaved?) this way from day one. Very annoying.