I can not imagine my life without my phone. I use it every day. It is the door which lets me keep in touch with the world. It is useful and small enough to take it anywhere I want.
     I am a student, and I use it to keep notes, check lesson plans, or search for words or instructions.  Since I spend many hours at school, it saves me when I forget things, and I also use it to pass time when I feel bored. I use it to call my mommy when I miss the bus home. Moreover, I can keep in touch with my friends and make plans to go out and have good time with them when I am able. 
     My phone can become addictive when I don't stop sending texts, so maybe it is not that good after all. On the other hand, I know that it is impossible for me to stay away from it, because I use it for so many things. It is so helpful. I can't imagine myself without this technology. 

     Unless you have to, try to write in the First Person, First Person Plural, or Third Person. This will enhance your essays and make them easier and more interesting. That said, your story is not rare. I am "addicted" to my iPhone too. 

MY PHONE AND ME

I couldn't imagine a world without my phone. I use it every day for everything. I'ts the door which lets you to keep in touch with the world. This is an useful object and it's small so you can take it wherever you want.

I'm a student so i use it to write my plans, search the lesson's hours and to look for a word or a task if i need it. Since i spend a lots of hours at school it saves me when i don't remember anything so it's awsome! Obviously i use it to spend pass the time when i'm boring bored because i can't follow all the hours's at school.
In addition it's reliable to call mommy when i lose miss the bus home!
Moreover i can keep in touch with my friends and plan to go out when i'm free and having have a good time with them.
However the phone causes dipendence from on it when you don't stop sending messages so it isn't all good at all. On the other hand we know that it's impossible to stay away from it, so we can use it for everything. It's so helpful.
I can't believe me without this piece of technology. <--- (I can't imagine life without this piece of technology)?

There you go ;-) Very good !!!

MY PHONE AND ME

I couldn't imagine a world without my phone. I use it every day for everything. I'ts the door which let you to keep in touch with the world. This is an useful object and it's small so you can take it wherever you want.

I'm a student so i use it to write my plans, search the lesson's hours and to look for a word or a task if i need it. Since i spend a lots of hours at school it save me when i don't remember anything so it's awsome! Obviously i use it to spend the time when i'm boring because i can't follow all the hours's school.
In addition it's reliable to call mommy when i lose the bus home!
Moreover i can keep in touch with my friends and plan to go out when i'm free and having good time with them.
However the phone cause dipendence from it when you don't stop send messages so it isn't good at all. On the other hand we know that it's impossible to stay away from it, so we can use it for everything. It's so helpful.
I can't believe me without this piece of technology.

COULD CORRECT YOU THIS?

. . . It's the door which lets you keep in touch with the world.  This/It is a useful object . . 

 . . look at my (lesson) timetable  ('search the lesson's hours')

 . . it saves me . . . awesome !

 . . I use it/spend time on it when I'm bored . . all the hours   we spend/spent at/in   school

. . when I miss the bus home !

. . and have a good time with them.

. . causes dependence/makes you dependent  on it when you don't/can't stop sending messages . .

. . as we (can) use it for everything

I couldn't imagine myself without this piece of technology

"Could you correct this"  [word order]

MY PHONE AND ME

I couldn't imagine a world without my phone. I use it every day for everything. I'ts the door which lets you to keep in touch with the world. This is an useful object(instrument) and it's small so you can take it wherever you want.

I'm a student and so i use it to write my plans, to search the lesson's hours and to look for a word or a task if i need it (to). Since i spend a lots of hours at school, it save me when i don't remember anything (it saves me a lot of time since I dont have to remember everyhing) so it's awsome! Obviously i use it to spend the time when i'm boring because i can't follow all the hours's school.
In addition it's reliable to call mommy when i lose the bus home!
Moreover, i can keep in touch with my friends and plan to go out when i'm free and having (have) good time with them.
However, the phone cause dipendence from it when you don't stop send messages so it isn't good at all. (I am often tempted to keep sending meesages and hence it causes depencece, which is not really good.) On the other hand, we know that it's impossible to stay away from it, so we can use it for everything. It's so helpful.
I can't believe me (imagine myself) without this piece of technology.

COULD CORRECT YOU THIS?