You cannot change a phone's frequency.
It really depends on the cell phone company you have some don't let you change and some do. I would advise you to contact your local cell phone company.
Do edit, then retype the number.
No. It might damage the phone, though.
Cell phone network extenders can be a wonderful way to improve your cell phone service. They are easy to install and are an affordable option if you do not wish to change your service provider.
screen change
Mobile Phones
That will just make your phone icky. Buy yourself a real vibrator.
Yes it is, it means you enjoy a vibrator which is strange
no
Yes.
You can only do it by computer