An interface built for agents to read. Hardline's published MCP tools give an agent a screenshot and coordinate taps, so every step needs a vision model to find the button. ERIUS PHONE returns the screen as a text accessibility tree with numbered refs — the agent taps a ref or a visible label, waits for text to appear, and falls back to a screenshot only when it has to. The API also installs an APK directly and reads crash logs, which is what app testing needs.
About half the price, and no wallet needed. $39 a month against $80. And if you or your company can't pay in crypto, Hardline is not an option today. To be straight about our side: ERIUS PHONE doesn't take payment at all yet — early access is free while we onboard teams by hand.
More than one phone. The Team preview plan is three isolated phones for $129 a month, each in its own container on its own network.
Calls and audio. ERIUS PHONE supports one-to-one voice and video calls with your agent over WhatsApp and Telegram, and the API can play audio into the phone's microphone. Hardline's published tool list has no audio tools; its camera option is a camera pointed at the phone's screen.
Where Hardline wins, plainly. It is real hardware with a real SIM. If you need a US mobile number for SMS verification, a carrier IP, or an app that refuses virtual devices, Hardline can do it and ERIUS PHONE can't: our phones are virtual, have no SIM, and aren't Play Protect certified, so some banking, DRM and game apps won't run. Hardline also lets you — or your agent — sign up and buy on your own today, and it has a hosted MCP endpoint. ERIUS PHONE is in early access: there is no self-serve signup, devices and API keys are issued by hand, and online payment is not live yet. The prices we publish ($39/mo for one phone, $129/mo for three) are preview prices.
Competitor details on this page were checked on 10 October 2026 against hardlinephone.com, hardlinephone.com/android-for-ai-agents, hardlinephone.com/llms.txt. Prices and features change; check the vendor's own site before you decide. Product names belong to their owners, and ERIUS PHONE is not affiliated with them.