After I installed the BTC companion package my iPhone 5S stop working.

My iPhone is stuck in the apple logo screen and reboots after the logo shows off.

What I have to do? I cant lose my iphones data. Help Me.

I`m using iPhone 5S 64GB iOS 7.0.6 and last stable version of BTC companion package.

It's unlikely that Bluetooth Companion causes a reboot loop. In any case, please try to hold volume up to boot without cydia substrate extensions. If it boots up, you may deinstall existing tweaks in Cydia to find out what caused it.