This week, 3 Diversified Telecommunication Services stocks are improving their overall ratings on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Atlantic Tele-Network, Inc. (ATNI) gets a higher grade this week, advancing from a C last week to a B. Atlantic Tele-Network, Inc. is a provider of wireless and wireline telecommunications services in North America and the Caribbean. For more information, get Portfolio Grader’s complete analysis of ATNI stock.

This week, Chunghwa Telecom Co., Ltd Sponsored ADR (CHT) pushes up from a C to a B rating. Chunghwa Telecom Co., Ltd Sponsored ADR 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.

This week, Cincinnati Bell Inc.’s (CBB) ratings are up from a C last week to a B. Cincinnati Bell Inc. is a full-service regional provider of data and voice communications services and equipment that operate over wireline and wireless networks. The company also gets A’s in operating margin growth, earnings revisions, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of CBB 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.