Weird vintage "messengers" that look like pagers, have a screen, and a keyboard/keypad

Motorola Instant Messenger Wireless Personal IM Free IMFree https://www.ebay.com/itm/Motorola-Instant-Messenger-Wireless-Personal-Starter-Kit-IM-Free-New/401598752059?_trkparms=aid%3D555021%26algo%3DPL.SIMRVI%26ao%3D1%26asc%3D20190711100440%26meid%3D50c3a3fe9f734ce9af5e3be61a603b2e%26pid%3D100752%26rk%3D2%26rkt%3D10%26mehot%3Dpf%26sd%3D323884258508%26itm%3D401598752059%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3DSimplRVIAMLv5WebWithPLRVIOnTopCombiner&_trksid=p2047675.c100752.m1982

Peek Email Messenger Device https://www.ebay.com/itm/Peek-MP2-Mobile-Personal-Messenger/293610140383?_trkparms=aid%3D555021%26algo%3DPL.SIMRVI%26ao%3D1%26asc%3D20190711100440%26meid%3D50c3a3fe9f734ce9af5e3be61a603b2e%26pid%3D100752%26rk%3D3%26rkt%3D10%26mehot%3Dpf%26sd%3D323884258508%26itm%3D293610140383%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3DSimplRVIAMLv5WebWithPLRVIOnTopCombiner&_trksid=p2047675.c100752.m1982

ZipIt Wireless Messenger works over WIFI (v2 and v3) https://www.ebay.com/itm/Zipit-Now-Z3-Wireless-Messenger-Messeging-Device-Verizon-WIFI/153639734570?hash=item23c5a44d2a:g:tVgAAOSwpFVdeUaV

Peek & Zipit both look like knock offs of Blackberry RIM devices