Contacts Global Test Equipment Inc 1424 Centre Circle Downers Grove, IL 60515 Phone: 866-409-0400 Contact Form Select the Department You Wish To Contact: General InquiriesTechnical SupportBilling QuestionsProduct ReturnsWebsite Questions Technical Support Let one of our equipment specialists assist you in selection, function or trouble shooting. Please fill out the form below or call our tech support department at 866-409-0400. Billing Questions Need to discuss an invoice/receipt or need another copy? Please fill out the form below or call our billing department at 866-409-0400. Product Returns Satisfaction with your order is our #1 priority! If you require attention to any detail, please contact your rep directly and we will resolve it immediately. - E-mail us at global_sales@4gte.com - Or call us at 866-409-0400 - Or fill out the form below Your Name (required) Your Company Your Email (required) Your Phone (required) Manufacturer and Model Information: Order, Invoice, or P.O.#: Message: This form collects your name, email, phone number and other information to help us serve you. This information may be stored for later use by GTE. Please check this box to confirm that you understand this. For complete details, please refer to our Privacy Policy.