YOU SAID:

I am going to go on my phone in the bathroom.

INTO JAPANESE

私はトイレで私の携帯電話に行くつもりです。

BACK INTO ENGLISH

I'm going to go to my cell phone in the bathroom.

INTO JAPANESE

私はトイレで携帯電話に行くつもりです。

BACK INTO ENGLISH

I'm going to go to my cell phone in the bathroom.