The grades of three Diversified Telecommunication Services stocks are better this week, according to the Portfolio Grader database. Every one of these stocks has an “A” (“strong buy”) or “B” overall (“buy”) rating.

This week, Chunghwa Telecom (NYSE:CHT) is showing significant improvement as the company’s rating hops from a C (“hold”) to a B (“buy”). Chunghwa Telecom is a telecommunications service provider that offers fixed line services, cellular services, and Internet and data services in Taiwan and Asia. For more information, get Portfolio Grader’s complete analysis of CHT stock.

Atlantic Tele-Network (NASDAQ:ATNI) gets a higher grade this week, advancing from a C last week to a B. Atlantic Tele-Network is a provider of wireless and wireline telecommunications services in North America and the Caribbean. Shares of ATNI have increased 9.3% over the past month, better than the 3% increase the Nasdaq has seen over the same period of time. For more information, get Portfolio Grader’s complete analysis of ATNI stock.

This week, BCE Inc. (NYSE:BCE) pushes up from a C to a B rating. BCE Inc. provides residential, business, and wholesale customers with wireline voice and wireless communications services, Internet access, data services, and video services. The current dividend yield is 2.3%. For more information, get Portfolio Grader’s complete analysis of BCE stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.