The grades of three Wireless Telecom stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Turkcell Iletisim Hizmetleri A.S. ADR (NYSE:TKC) ups its rating to a B (“buy”) this week after earning a C (“hold”) in the week before. Turkcell provides mobile services in Turkey. In Portfolio Grader’s specific subcategories of Earnings Revisions, Cash Flow, and Margin Growth, TKC also gets A’s. For more information, get Portfolio Grader’s complete analysis of TKC stock.

This week, SBA Communications (NASDAQ:SBAC) is making solid headway. The company’s rating improves to an A (“strong buy”) from last week’s B (“buy”) rating. SBA Communications owns and operates wireless communications infrastructure in the United States. The stock price has risen 6.4% over the past month, better than the 0.5% increase the Nasdaq has seen over the same period of time. For more information, get Portfolio Grader’s complete analysis of SBAC stock.

This week, Shenandoah Telecommunications’ (NASDAQ:SHEN) ratings are up from a C last week to a B. Shenandoah Telecommunications provides telephone and wireless personal communications services under the Sprint brand name. For more information, get Portfolio Grader’s complete analysis of SHEN 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.