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In desktop Chrome, open DevTools, turn on Device Mode, choose Responsive, and enter 393 for width and 873 for height. These are CSS-pixel viewport dimensions—not physical screen pixels. Check the page’s mobile viewport setup, layout, content, images, and key interactions, then verify on a real Android phone if the result needs to support a compatibility claim. A 393 × 873 emulation is a useful test case, but it does not establish compatibility with every Android phone in India.
Set up the 393 × 873 CSS-pixel test in Chrome
- Open the website in desktop Chrome, then open DevTools using the browser menu or your usual keyboard shortcut.
- Turn on the Device Toolbar (Device Mode).
- In the device controls, select Responsive and enter 393 for width and 873 for height.
- Keep those values as entered. Do not multiply them by the device pixel ratio (DPR); DevTools exposes DPR separately.
- Reload the page and inspect it from the top to the bottom. Exercise the navigation, menus, forms, and other important interactions.
Chrome describes Device Mode as a simulation of mobile use from a desktop, not a mobile device itself. See Chrome’s Device Mode documentation for the controls and their limits.
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Check the page, not just the dimensions
Confirm the mobile viewport
Look for a viewport declaration in the document head, commonly <meta name="viewport" content="width=device-width, initial-scale=1">. Android Developers recommends setting the viewport width to device-width and using flexible CSS media queries for mobile layouts. If the page lacks a suitable viewport declaration, the emulated layout may not reflect the intended mobile experience. See Android Developers’ guidance on web app screen support.
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Inspect layout and content
- Look for horizontal scrolling, clipped sections, overlapping elements, and text that is truncated or hard to read.
- Check that images fit their containers and remain clear enough at the selected viewport and DPR.
- Open menus and dialogs, submit forms, and test important links and controls. Check that controls can be targeted comfortably by touch.
- Scroll through the whole page, including the footer and any content that loads later.
These are practical checks for this viewport, not a published certification checklist. Passing them means the page looked and behaved as expected in the tested configuration.
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Understand CSS pixels, physical pixels, and DPR
The viewport is the area the browser makes available to the page. CSS pixels describe the page’s layout dimensions; physical pixels describe the screen hardware. DPR expresses the relationship between them. Consequently, a 393-pixel-wide CSS viewport remains 393 CSS pixels wide when you change DPR: DPR affects rendering density, not the width you entered for the layout test.
The 393 × 873 dimensions are a requested test geometry, not an established standard for Indian Android phones. The sources cited here do not establish India-specific handset prevalence or DPR distributions, so do not treat a particular DPR setting or this one viewport as representative of Indian Android users generally. Android Developers’ viewport documentation explains the CSS-pixel and density distinction; its older discussion of wide default viewports is background, not a current measurement of every browser.
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Test beyond one viewport
Responsive breakpoints and tall-screen behavior can fail just outside the target dimensions. Repeat the inspection at nearby widths and at a different aspect ratio. Android’s responsive/adaptive design guidance recommends checking varied screen sizes and aspect ratios; that is useful testing context, not a web-browser compatibility guarantee. See Android Developers’ responsive and adaptive design guidance.
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Or skip the browser setup
For a repeatable screenshot at this viewport, call ScreenshotNeo’s API. See the ScreenshotNeo API documentation for request options.
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://example.com --data-urlencode width=393 --data-urlencode height=873 -o shot.webpScreenshotNeo accepts cookie and consent banners like a visitor and removes more than 60 known consent platforms, newsletter popups, and chat widgets before capture; those steps can be turned off. Bot checks, blank pages, timeouts, failed loads, and cache hits cost nothing, and response headers identify the page verdict and billing status. Its MCP server lets AI agents use screenshot tools, and 1,000 screenshots a month are free with no card; paid plans start at $5 for 3,000 shots. A screenshot API is useful for repeatable captures, but it does not replace checking touch behavior on an actual phone.
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Troubleshoot common test issues
The page looks like a desktop site at 393 pixels
Check whether the document declares a mobile viewport. Android Developers recommends width=device-width; without suitable viewport setup, a narrow emulated screen may not produce the intended mobile layout.
The emulated result differs from a phone
That is possible: Device Mode is an approximation from desktop and does not reproduce every mobile hardware or browser characteristic. Confirm the behavior on the physical Android phone and browser that matter to your release.
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The page fits at 393 pixels but breaks nearby
Test nearby widths and another aspect ratio, then inspect the relevant responsive breakpoint or fixed-width element. One passing geometry does not demonstrate responsive behavior across other screen sizes.
What this test can establish
A careful run establishes whether the page’s visible layout and selected interactions worked in Chrome’s simulated 393 × 873 CSS-pixel configuration, including whatever DPR you chose. It does not establish compatibility with every Android phone, browser, or user in India. For a consequential release or compatibility statement, include real-device testing and additional sizes.
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