"To call" vs. "to ring"
What is the difference between the verbs "call" and "ring" in the meaning of telephoning? For example:
- I will ring you back shortly.
- I will call you back shortly.
The two words are identical in meaning here. The usage of call is obvious, while the usage of ring simply originated from the noise a telephone makes when you call someone.
Ring is definitely a more informal word, so if in doubt, use call.
Ring is generally used in the UK, while call is used in the US. There's no difference in meaning.