50 Cent is in court today to fight for more time with his son Marquise -- but Marquise's mama says that he might want to start by actually talking to him on the phone.
Shaniqua Tompkins told us going into court that her son talked to Papa Cent on his birthday July 6, but Fitty hasn't talked to him since! Meanwhile, baby mama apparently needs new kicks -- her heel broke on the way in!
We just heard that moments ago, both Fiddy and Shaniqua had to take a drug test, and the results will be back any minute. (Fiddy was clean, but Shaniqua tested pos ... for cough medicine.)