T-Mobile is a strong choice for users in the U.S. seeking extensive 5G coverage and a variety of plans, while Telefonica is well-suited for users in Germany prioritizing comprehensive 4G LTE coverage, growing 5G availability, and robust data protection measures. The best choice depends on the user's location and specific needs.
| Attribute | T-Mobile | Telefonica |
|---|---|---|
| Network Coverage (5G, 4G LTE) | 5G covers a significant portion of the U.S., with the largest 5G network covering 41.25% of the country and reaching 98% of Americans. 4G LTE covers 99% of Americans. Extended Range 5G offers broad coverage, including rural areas, while Ultra Capacity 5G provides faster speeds in urban areas. Expansion since acquiring Sprint in 2020. | 4G/LTE coverage to over 99% of the population in Germany. 5G: 98% coverage in Germany as of June 2025, aiming for nationwide coverage by the end of 2025. Launched 5G Plus network in Germany, utilizing frequencies exclusively for 5G. Expanding 5G network in major cities and rural areas. |
| Data Speed and Reliability | Ultra Capacity 5G delivers speeds up to 3.3 Gbps, potentially 5x faster than 4G LTE. Actual speeds vary by device, location, and network conditions. Speeds may slow down in places with less population. | Telefonica demonstrated data transfer speeds of up to 800 Mbps in its 4G network using technologies like MIMO 4x4 and 256QAM modulation. Upgraded hundreds of LTE 4G sites for higher surfing speeds. |
| Pricing Plans and Contract Options | Offers various plans, including Go5G Next, Go5G Plus, Go5G, Magenta MAX, and Magenta. | Not available |
| Customer Service Quality and Responsiveness | Generally considered responsive and helpful. AI chatbots are available for basic questions, with live representatives for complex issues. | Telefonica is using AI-powered support and automation to improve productivity and service quality. Using Conversational AI bots and AI Agent Assist to help agents in real-time. |
| International Roaming Options and Costs | Plans include international data roaming. Go5G Next and Go5G Plus plans offer up to 5GB of high-speed data in over 215 countries. Magenta MAX offers up to 5GB of high-speed data in more than 215 countries. International passes are available: 1-Day (512MB) for $5/day, 10-day (5GB) for $35, and 30-day (15GB) for $50. | Collaborates with over 540 mobile network operators to provide services in over 190 countries. "Roam like at home" in the EU, allowing customers to use their national tariff for voice, SMS, and data without extra charges. |
| Device Selection and Financing | Offers a variety of devices, including smartphones and tablets. Financing options are available. | Not available |
| Security Features and Data Privacy | Uses encryption and multi-factor authentication. New default privacy settings affect data collection and sharing. Customers can adjust privacy settings in the app or website. | Employs a comprehensive range of Identity & Data Protection solutions. Applies the principle of Privacy by Design, incorporating data protection into development processes. Utilizes a dedicated internal platform to evaluate and document all data processing activities. Offers digital certificates and electronic signatures to secure electronic communications and document signing. Committed to transparency, control, and security of personal data. |
| Bundled Services (e.g., TV, Internet) | Offers 5G Home Internet. | As an integrated telecommunications provider, Telefonica Deutschland also provides fixed-network solutions via DSL, cable, fiber, and fixed-network replacement products. |
| Network Technology (e.g., VoLTE, 5G) | Utilizes VoLTE (Voice over LTE) for calls. 5G Extended Range provides broad coverage, and 5G Ultra Capacity delivers faster speeds. | VoLTE: 80% of calls on their network are made via VoLTE, which provides faster call connections and better voice quality. Utilizing 5G SA (Standalone) network. |
| Coverage in Rural Areas | Extended Range 5G reaches many rural areas. Working to expand coverage in rural areas. | Working with Telekom and Vodafone to close mobile network gaps in rural areas. Customers of Telefonica, its partner brands, and the national roaming partner will receive fast 4G mobile reception at up to 2,000 additional locations. |
| Deals and Promotions | Offers various deals and promotions, including discounts on phones and plans, trade-in offers, and discounts for military members, first responders, and people over 55. | Shareholders can access discounts on various products and services from brands like Bosch, Ikea, Groupon and Nike. |
| E-SIM Support | Supports eSIM (embedded SIM) technology, allowing activation without a physical SIM card. | Supports eSIM, with increasing activations. Offers a Thales eSIM subscription management platform. |