It wasn't mine, but the people I worked for owned a Compaq portable computer in the early 1980s that was built in a suitcase design. I don't remember the specs very well or even if it had a hard drive. They had bought Lotus 123 with it. Few understood how to actually use it or even wanted to so I took it home and learned how to do spreadsheets. Seems like the software was expensive for the day at $495. I've never liked the MS spreadsheet by comparison to this day.
I repaired one of those, by then an antique, in the early 1990's. If it's the model I recall, it had a 6" or 8" screen on the left, and a 5.25" floppy on the right, with room for an additional 3.5" floppy or hard disk. The optional hard discs at the time were 20 or 40 MB, and I think they could take up to 4 MB RAM. DOS only, I don't think they ever ran any version of Windows, the screen was monochrome only. The keyboard latched over the face of the suitcase to form a screen and disk drive cover.
1995 I pulled up to a stop light in a small town. I was on the phone with the boss. The kid in the car next to me was jumping up and down hitting his mom pointing at me and yelling 'He's on the phone. He's got a phone" lol
Those were the first mobile phones. They had a household type receiver and a coiled household type cord that connected to a small backpack of hardware. We called them bag phones. 5 yrs later everybody had a flip phone.
I think you must be misremembering the year, there. Bag phones came out in the 1980's, and were already falling out of favor by 1990, for all but people requiring connection to the older AMPS networks. The Motorola MicroTAC's came out in 1989, and by 1990 most folks buying a new cellular phone were putting it into their pocket, not carrying it in a bag. I think I got my first MicroTAC (DPC550 CellStar) around 1992/93.
But if you really want to go back, we had a car phone from about 1978/79 onward. It had one box the size of a VCR, typically mounted on the trunk shelf, a second box you would mount under the passenger seat, and then a handset that would mount on a swivel cradle on the dash. The handset had a simple keypad that looked a little like a Colecovision game controller.