Ro - Ro is made by the Robloxian government for phones, gaming and more, it makes "RoPhones" or "RoPads" (Tro is pronounced "T" then "Ro" Sometimes "Tro"
Pear - Pear is the best selling with phones and tablets. It even has a pear shaped phone! Its phones and tablets are known as "E-Phones" or "PearPhones" and with the tablets its known as "E-Tablets, E-Pads, Pear-Tablets and PearPads.
Jeonja - Robloxians believe this company should not exist, but it has crashed once and since then has nearly recovered.