getting nervous about smartphone performance,need help?

[Aditya]

I had bought Sony xperia ion Lt28h before 5 months ago. at first phone was not doing enough as compared to its configuration
after that I updated phone from auth. Sony dealer to jellybean 4.1.2
after camera interface changed and clearity also changed
After update phone worked fine but then it started showing its character
hangs every time while downloding on 3G
hanging when playing good quality videos
camera isnt looking like 12mp
my friends Samsung 8mp capturing better and fast than this
at the time of listning music if u open Album or Chrome browser music stops working
still date Facebook isnt accessible from system app.
company published it with 1Gb ram but its only 680mb
company cheated on this
phone is heating tooo too much
shows error while connecting to hotspot
Plse help me to get rid of this problems
as changing phone is not possiblr for me ritenow so plse dont suggest to change it
just suggest what can I do to resolve this problems?
as company cheated with ram amount shoul

[chubbystream813]

Hello Aditya. I'm sorry to hear about the issues you've encountered with your Xperia Ion. I recommend you backup your data and perform a software repair with the instructions linked below.
http://talk.sonymobile.com/thread/54636

For further assistance, or if the issue persists, please contact your local Sony Mobile support team. Our numbers are listed on the next link.
http://www.sonymobile.com/global-en/supp...tact-info/

I apologize for any inconveniences.

- Andrés