Student or Learner
In the sentence below, I extracted from the economist, why don't they use "suffered from poor hardwares" since phones are plural?
"Some earlier Windows phones suffered from poor hardware"
The word ware by itself can be pluralized to form wares, as in "I am interested in purchasing some of your wares."
However, when ware is part of a compound noun, it becomes uncountable (as far as I can tell).
Off the top of my head, kitchenware, software, hardware, malware, and spyware are all uncountable, so they all remain in the singular form. (If there are exceptions here, I would be interested in hearing them!)
"Telephone" is unrelated to the word "hardware." You can count telephones when you walk into a store, but you cannot count hardware, strangely. You can count pieces of hardware though.