My last visit to Nepal was 2010 and I carried our old phones and I wanted to know the value and checked the price. They were too old and can not be sold.
Our country is developed that much.
Hope no one tells you take your junk back to usa. Some one wanted to give a digital camera ( 6/7 years ago) that was not the standard of receiver because it must be a DSLR camera.

You will be fine, if your luggage opened , tell them , could not throw away still working and someone can utilize.