We are working on an SMS based reporting project where the people with age 30-60 will be sending SMS reports. Apart from the complexity of the SMS structure, one of the major issues I have faced during the training sessions is that many people don't know how to send SMS. And with so many different brands of mobiles in the market, SMS sending process in one mobile is totally different from other mobile. Two of the major ways of sending SMS (that i have found so far) are:

1. A one page form where both "To" and "Message" box appears and one can move up and down to type the message and to phonenumber. 
2. Two step process where one first types the message and goes to the second step to type the phonenumber

In the training, i am planning to include the pictorial forms of both the processes. It occured to me that if there are any standard ways of teaching on how to send SMS, from UX perspective, so that they can follow on their own. 

Note that we are dealing with people (male/female, some are quite old in 50s, there might be people who don't know how to read english, though they know how to dial and receive calls) who are using mobiles for voice only and they have all different kinds of mobile brands - nokia, samsung, even few andriods, some unknown brands, some chinese, some indian, etc.