: Terminal E (Gate E2) and the Terminal C/D Connector.

: Terminal C (after security) and Terminal E (near Gate E24). Automated Kiosks :

: Located in Terminal D and other terminals, these machines sometimes stock "SIM International" starter packs, though availability for specific US carriers (like T-Mobile) may vary.

: Upon exiting customs in Terminal E, the Wall Street Journal store has previously been noted to carry SIM cards, though stock may be limited to specific brands. William P. Hobby Airport (HOU)

: This is the largest electronics retailer at IAH and sells travel SIM cards.

: An electronics shop that may carry travel accessories and SIM-related products. Location : Near Gate 45.

In Houston airports, you can purchase prepaid SIM cards at dedicated electronics stores, travel retail shops, and automated vending kiosks . At , the most reliable options are tech retailers located within the terminals, while William P. Hobby Airport (HOU) has fewer specialized outlets. George Bush Intercontinental Airport (IAH)

: While HOU offers various visitor services and automated vending (IVKs), dedicated SIM card kiosks are not as widely documented as they are at IAH. Important Tips for Travelers Where/how to get a new sim card at IAH airport? - Houston