the 1st mobile phone I had was a Motorola that was so big it filled up 1/2 a car trunk.
Next ones, when I worked the oilfield in Austin Chalk play, was called a 'ranch radio' that looked like a CB radio.just a special 2 way radio called SMR or Specialized Mobile Radio. You pushed a pushed a button, which dialed a mobile operator, and you told the operator what # you wanted, and the operator connected you to whoever you wanted to call. The 'ringer' was connected to your truck or car horn. So many people had them, the little watering hole I used to frequent, there was forever someone's horn going off and 1/2 the place would go running out to see if it was their ranch radio calling, since the horns all sounded the same.