The grades of 3 Wireless 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”).

T-Mobile US, Inc. (TMUS) gets a higher grade this week, advancing from a B last week to a A. T-Mobile US, Inc. offers mobile communications services under the T-Mobile brands in the United States, Puerto Rico, and the U.S. Virgin Islands. The company also gets A’s in operating margin growth, earnings growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of TMUS stock.

TIM Participacoes S.A. Sponsored ADR (TSU) improves from a C to a B rating this week. TIM Participacoes S.A. Sponsored ADR is a mobile telecommunications services provider in Brazil. The company also gets A’s in earnings surprise. For more information, get Portfolio Grader’s complete analysis of TSU stock.

This week, Cellcom Israel Ltd.’s (CEL) ratings are up from a C last week to a B. Cellcom Israel Ltd. provides cellular communications services. The company also gets A’s in earnings growth, earnings revisions, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of CEL 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.