Given the following question, let's solve step-by-step. Is the following sentence factually correct?
"T-Mobile US focuses on providing mobile phone service and wifi to the United States."
Options:
- yes
- no

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
T-Mobile US is a cellular device company that operates in North America.
The final answer: yes.