What are the rulings of phone sex during Mutah. Can they get orgasm/ejaculation by talking/seeing to each other on phone??

If the objective is to arouse one’s spouse and guide him/her in masturbation to the point of having an orgasm, then this would not be permitted.

If one avoids masturbation, but has an orgasm by merely having an conversation with one’s spouse, then this also does not seem to fall into the unlawful, provided the objective was not to masturbate or have an orgasm.