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

Towerstream (NASDAQ:TWER) is bettering its rating of C (“hold”) from last week to a B (“buy”) this week. Towerstrea provides customers high speed Internet access over a fixed wireless network transmitting over both regulated and unregulated radio spectrum. The stock price has risen 25.7% over the past month, better than the 4.7% increase the Nasdaq has seen over the same period of time. For more information, get Portfolio Grader’s complete analysis of TWER stock.

This week, FairPoint Communications (NASDAQ:FRP) is showing good progress as the company’s rating jumps from a B (“buy”) last week to an A (“strong buy”). FairPoint Communications provides communications services to residential and business customers.

For more information, get Portfolio Grader’s complete analysis of FRP stock.

8×8 Inc. (NASDAQ:EGHT) boosts its rating from a B to a A this week. 8×8 provides voice-over-Internet protocol creation platforms, hosted Internet PBX solutions, voice and video semiconductors, and related software. Investors seem to agree with the upgraded status of the stock, and have pushed the stock up 16.7% over the past month. The stock currently has a trailing PE Ratio of 6.90. For more information, get Portfolio Grader’s complete analysis of EGHT 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.