my first iphone and need some help

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just got a 32gb gold 5s

my first iphone

my old phone is a sony exp go

few questions

sent a text to my old phone said sent on iphone but not got text?

ive turned on icould , find my phone etc, but is there any way to stop a person turning off the phone as whats the point if they nick it and turn it off cant track them if they dont turn back on


texting is faster on the sony predictive text is 5 times faster any way to change this texting is well annoying and slow

also what so special about io7 my daughters iphone 3 seems the same to me

 

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now ive entered the wrong pin on start up and its disabled the phone

please how to i get out of this

think once sorted i may sell this phone at least my sony is faster for texting and gps aint all the time on for finds my iphone sony phone just sends a signal flare over even when gps is off

 

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anyone