"High-Tech American, Japanese and Banta Singh" joke

Three men - an American, a Japanese and Banta Singh were sitting naked
in the sauna. Suddenly there was a beeping sound.
The American pressed his forearm and the beep stoped. The others looked
at him questioningly. "That was my pager," he said. "I have a microchip
under the skin of my arm."
A few minutes later a phone rang.
The Japanese lifted his palm to his ear. When he finished he explained,
"That was my mobile phone. I have a microchip in my hand."
Banta felt decidedly low-tech but not to be outdone, decided he had to
do something just as impressive. He steped out of the sauna and went to
toilet. He returns with a piece of 'Toilet paper' hanging from his butt.
The others raised their eyebrows and said, "Wow! What's that?" "I'm
getting a Fax," he explains.