The best place to go is the manufacturers website. They will have a special code that you can punch in and it will reset the phone. You can also call the phone company and they may be able to help you.
You can find simple instructions here: http://www.mobileslate.com/blog/2008/06/14/how-to-unlock-samsung-katalyst-t739/
One can find information on how to unlock cell phones through performing a simple inquiry at your local library. Alternatively, you could research the answer on websites such as e-how or lifehackers.
The are many online sources that tell you how to unlock cell phones. Also asking the pawn shop owner may be a good way to get you cell phone unlocked.
The accidental locking of a cell phone can be quite frustrating if you don't know how to unlock it. Most owner manuals come with directions that detail how to unlock for use.
Vendors who offer cellular phones generally offer them unlocked so that you can use the service of your choice. If you buy a cell phone from an individual, you can find instructions online to unlock it.
One can find instructions on how to unlock a cell phone on the 'how stuff works' website. They have a detailed step by step guide one can follow. 'Wikihow' have a similar guide.
You can find these type of phones on Ebay. They are normally used and already have had the unlock code entered in them. A lot of the sellers offer free delivery.
You can find no contract cell phones at the same places that you find regular cell phones. However, you have to also buy a top up card to get airtime.
One can find wholesale cell phones for sale by visiting the eBay website. One can also find wholesale cell phones by visiting the gsmExchange and the Liquidation websites.
You can find cell phones at wholesale prices online in online stores such as Amazon or eBay. In addition, you can find cell phones at wholesale prices at the official cell phone company's website.
From my search I couldn't find a book that teaches cell phones for seniors. I did however find a site that offers senior friendly phones. The site is www.info4cellphones.com/cell-phones-for-seniors.html.
There are many places you can find cheap, unlocked cell phones. EBay is one of those places. If you search for cell phones and sort by price, you can't go wrong!