iPhone Activation problem?

Hello, new to this site as you may tell. For reference, I'm on an iPhone 5 running iOS 6.
After downloading an an app on Cydia, PDAnet, the download did not complete, and ended in an error. It then asked me to restart my springboard, which I did. But after restarting my springboard, the iPhone booted up, took me to an iOS 6 setup screen, and required an activation. This is obviously concerning because I already activated my iPhone awhile ago. I tried to activate it both using my cellular connection and a WIFI connection, and both methods resulted in an error message, "Your iPhone could not be activated because the activation server is temporarily unavailable." Why did I have to activate my phone again, why is not letting me, and why did this happen after trying to downloading this Cydia app?

Thanks!

Applejuiced said:

I'd try to boot into safe mode and then remove the last few cydia packages you installed before that happened.

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Even in safe mode, if at all in safe mode (I tried to boot in safe mode by holding down the volume button) I can't bypass the activation screen. It will not let me activate it. Any other options?

darricksailo said:

It's the volume up button, as far as I'm aware of

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Yes, Im aware of that. I cannot however confirm I am in safe mode, but I have followed all the steps to boot it into safe mode.