Ringtone volume decreases after silenting and unsilenting my HTC Desire X

It's that clear as Title says. 1. I can see that current Ringtone and Notification volume is at the highest level. 2. I now put my phone in silence mode and deselected Silent (I selected it using maximizing the top nav(?) bar, and activating silent (and then deactivating silent mode) from there. 3. Now I go back to Settings and see that the Volume is very low (about 10% as it looks). ---- I want my settings back after disabling Silent mode and going Normal. Environment: * Phone: HTC Desire X Dual Sim * Android Version: 4.1.1 * Kernel Version: 3.4.0-ge410a46 * Software number: 1.0.0. Desire X I can also give the whole information in Settings -> About -> Software Information if they are not enough.