Bottom line, do you suspect she's up to something more serious than being 14 and thinking it's gross for Dad to know what she jabbers about with her little girlfriends?
Only you know what you may or may not think is on that phone - or in her room, her backpack, etc. If you think it's serious enough to risk alienating her to uncover it and put a stop to it before it gets out of hand then spying and snooping isn't something to avoid, it's your job.
If not, this is normal teenage girl behavior. Set the rules up front about what you must know and how much access she must give you and enforce those rules, but you need to walk a fine line between being involved and letting her have space to mature. Tough call, dad. Good luck.
Only you know what you may or may not think is on that phone - or in her room, her backpack, etc. If you think it's serious enough to risk alienating her to uncover it and put a stop to it before it gets out of hand then spying and snooping isn't something to avoid, it's your job.
If not, this is normal teenage girl behavior. Set the rules up front about what you must know and how much access she must give you and enforce those rules, but you need to walk a fine line between being involved and letting her have space to mature. Tough call, dad. Good luck.