I just lost my iPhone and I have personal info in there, can the finder see them?

Please help.

If your phone is password protected thfhy will need you password to open any information you may have. If its not, then your private information (if its in notepad, docs fb or any non-password protected app/file) will be there next story book. However! Apple has designed an app for this specific occasion called "find my iPod". After inputting your apple I'd and password you can manually lock you device from where ever (you will be asked to create the password you wish to lock it with) you are and leave a note on the lock screen or even tell where you left it! Of course, I'm sure this depends on wether or not your device is connected to the Internet or charged so I would do this as quickly as possible

If you had no passcode then yes, nothing is stopping them.
If you did, then they may just not bother & try to restore it.

If you set a pass-lock for the phone, then all your personal info will be safe. The finder will need to restore the phone in order to bypass the lock. If not, the finder can view all the stuff on your phone. If you have set up find my iphone on the device before, you may try to use it to track, lock or erase the phone. Learn more here: http://www.wikihow.com/Find-a-Lost-iPhone
IIf it does not work, it is better for you to contact your service provider and phone provider and see if they can help. To prevent your new idevice from being stolen or lost in the future, I suggest you apply some free anti-theft apps like iLostFinder except set up Find My iPhone/iPad/iPod in iCloud on the device. It will take pics of the thief or finder when she/he tries to open your device with a wrong pass and then send the pics to your email etc. Hope it helps.

http://ikeymonitor.com/free-apps