This is the 6777th most frequent Russian word.
ulefone
"Ulefone" is not a Russian word; it is a brand name for a Chinese smartphone manufacturer.
In this sentence, "Ulefone" is used as a brand name of a product I purchased, specifically a smartphone.
Я купил новый смартфон Ulefone вчера.
I bought a new Ulefone smartphone yesterday.
Here, "Ulefone" is used to denote the brand that manufactures the phone mentioned.
Он спросил, пользуюсь ли я телефоном фирмы Ulefone.
He asked if I use a phone from the Ulefone company.
In this sentence, "Ulefone" refers to the name of the company or brand's website where the models were found.