David "Dave" Miller
Technical Support Lead & Troubleshooting Guru · Cellesim
Reporting from the tech hub of Seattle, David 'Dave' Miller is the Technical Support Lead for Cellesim. With a background in mobile hardware repair, Dave focuses on the nitty-gritty of connectivity. He creates deep-dive troubleshooting guides for 'Sim Not Supported' errors, locked devices, and manual activation codes. Dave is the go-to expert when the QR code doesn't work and you need a technical fix fast.
Related reading(18)
Savings & ComparisonsSingapore Roaming Shock: Save 70% on Data with an eSIM in 2026
A 7-day Singapore trip can cost $150+ in roaming. Discover how Cellesim eSIMs reduce that to $15. Compare costs, avoid bill shock, and get connected instantly in 2026.
Destination GuidesPortugal Roaming Costs $15/Day: The 2026 eSIM Alternative for Travelers
Portugal roaming bills average $15/day. Compare 2026 eSIM plans, discover seamless connectivity from Lisbon to the Algarve, and save up to 90% on data. Avoid bill shock.
Destination GuidesKingstown to La Soufrière: Your eSIM Guide for St. Vincent Island
Explore St. Vincent from Kingstown to La Soufrière with reliable eSIM data in 2026. Get instant connectivity, avoid roaming, and travel smart. Buy your Cellesim eSIM today!
Destination GuidesT-Mobile International Data Pass Alternatives: Discover Cellesim eSIM
Ditch expensive T-Mobile International Data Passes in 2026. Discover Cellesim eSIM for faster speeds, wider coverage, and transparent pricing. Explore plans now!
Destination GuidesBest eSIM for Kosovo Travel 2026: Your Connectivity Guide
Stay connected in Kosovo with Cellesim eSIM in 2026. Get instant data, avoid roaming fees, and explore Pristina, Prizren, and beyond. Buy your Kosovo eSIM today.
Destination GuidesUltimate Guide to Internet for Your Alps Ski Holiday 2026
Ensure seamless connectivity on your 2026 Alps ski holiday with an eSIM. Get high-speed internet in France, Switzerland, Austria & more. Explore Cellesim plans now!
eSIM 101 / Tech HubCellesim: Your Ultimate Guide to Choosing the Best eSIM Provider in 2026
Find the top eSIM provider for your 2026 travel. Explore Cellesim's global coverage, seamless activation, and competitive plans. Stay connected effortlessly!
Savings & ComparisonsEgypt eSIM vs. SIM Card 2026: The Ultimate Cost & Convenience Guide
Traveling to Egypt in 2026? Compare eSIM vs. local SIM vs. roaming for data. Uncover hidden costs & find the cheapest way to stay connected. Get your Egypt eSIM today!
Destination GuideseSIM vs. Local SIMs for a North America Road Trip (2026)
Planning a 2026 North America road trip? Discover if eSIMs or local SIMs offer the best data, cost, and convenience. Get seamless connectivity now.
Destination GuidesParis in Spring 2026: Your Ultimate Guide to Parks, Cafes & eSIMs
Planning a trip to Paris in Spring 2026? Discover essential tips for parks, cafes, and staying connected with a Cellesim eSIM. Learn more now!
Savings & ComparisonsDiscover the Cheapest eSIM Plans for 2026 Global Travel
Find the cheapest eSIM plans for global travel in 2026. Save on data roaming with Cellesim's affordable, instant activation eSIMs. Explore plans now!
Destination GuideseSIM for Travel to Costa Rica: Your 2026 Connectivity Guide
Planning a trip to Costa Rica in 2026? Discover how Cellesim eSIM offers instant, reliable, and affordable connectivity. Avoid roaming fees and stay connected effortlessly. Explore plans now!
Destination GuidesHow to Avoid Roaming Fees on Your 2026 Italy Summer Vacation
Planning your 2026 Italy vacation? Discover how to eliminate expensive roaming fees and stay connected effortlessly with Cellesim eSIM. Get instant data now!
eSIM GuideCanton Fair 2026: The Business Traveler's Ultimate eSIM Guide
Prepare for the Canton Fair 2026 with the ultimate business traveler's guide to eSIMs. Learn how to stay connected in Guangzhou, avoid high roaming charges, and set up your China eSIM for a seamless trip.
Travel Styles / PersonasItaly During Easter 2026: The Ultimate Connectivity Guide
Planning your Easter 2026 trip to Italy? Our guide breaks down whether an eSIM, local SIM, or roaming is best for staying connected. Make the smart choice before you fly.
eSIM GuideYour Ultimate Bali eSIM Guide: Seamless Connectivity for 2026
Get ready for your 2026 Bali adventure with our complete guide to eSIM technology. Learn how to set up, activate, and manage your travel data with confidence.
eSIM GuideeSIM vs International Roaming: Which Is Actually Cheaper for Travelers?
Tired of expensive roaming fees? This detailed guide breaks down the costs of eSIM vs international roaming, showing you how a travel eSIM can save you money.
Travel Styles / PersonasWhat Happens If I Run Out of Data on My Travel eSIM?
Worried about running out of data on your travel eSIM? Discover what really happens, how to check your balance, and the simple steps to top up instantly.