T-Mobile offers BlackBerry and Windows Mobile email solutions for businesses; its aggressively priced plans appeal to SMBs and prosumers, but high-end enterprises will remain unimpressed until a 3G upgrade is complete. This report contains insight and analysis of the product or service strengths and weaknesses, list of buying criteria and how the product or service fares in each category, and a comprehensive table of product or service metrics and specifications. This report is useful for purchasers who need to evaluate products, or as a source of competitive intelligence for vendors.