Usually most input methods used for Chinese (and thus used by Chinese) are not based on tons. For pinyin it is really rare that you input a single character at a time, you usually input a word composed of at lest two characters or directly a sentence.

According to the IM you use you will have to choose from a list of proposition for different possible characters matching the pinyin. I use Sogou pinyin daily and for this kind of situation it is very rarely i have to choose characters not already "pre selected".

Usually most input methods used for Chinese (and thus used by Chinese) are not based on tones. For Pinyin it is really rare that you input a single character at a time; you usually input a word composed of at least two characters or a sentence directly.

According to the IM you use you will have to choose from a list of propositions for different possible characters matching the Pinyin. I use Sogou Pinyin daily and for this kind of situation it is very rare that I have to choose characters not already "pre selected".