Yes and no, there is mobile phone coverage in some of the park; the signal strength varies so one needs to stop where the signal is at its best to make a call.
The use of cellular phones in public areas and on game drives is not permitted. You are in the African bush - it is time to switch off your phone, sit back, relax and listen to the sounds of the bush.
At the rest camps there is normally good cell phone reception.
Do you want to test your knowledge on the animals of the Kruger National Park?