Yes, they do. You have to search for them on the sprint site. There are not a lot of them yet, but they do have them.
There is not a known problem, but the nextel customer service department would be happy to help you with your problem. Just give them a call and they can walk you through the steps to get your ringtone installed.
There are many places where one can find custom call tones. One can find custom call tones at popular on the web sources such as Boost Mobile and My Cricket.
If it is PUK block or sim block you need to call nextel, if you blocked it by putting in a different sim from another company, then your phone is fried.
The Sprint Nextel Corporation, of which Nextel is a part, is based in Overland Park, Kansas. Sprint bought Nextel in 2005. You can find Nextel online at www.nextel.com.
What year did Nextel come out
One can find a variety of free call tones for their cell phone on the 'Zedge' website. They can also be downloaded for free from 'Caller Tones', 'Myxer' and 'Google Play'.
You can find many nextel phone deals. You could call their customer support line to find out more about them. You could also try to see what phones your friends have and see what deals that they have.
notes
Nextel Communications's population is 19,000.
The population of Sprint Nextel is 40,000.
Sprint Nextel was created in 1938.
Nextel is the older company out of the two. Nextel was formed 1987 and Verizon was formed 2000.