Report Summary

  • 20

    Performance

    Renders faster than
    37% of other websites

  • 70

    Accessibility

    Visual factors better than
    that of 36% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 84

    SEO

    Google-friendlier than
    53% of websites

mobiles.co.uk

Cheap Mobile Phone Contracts | Best SIM Free & Upgrade Deals

Page Load Speed

73.8 sec in total

First Response

587 ms

Resources Loaded

53.9 sec

Page Rendered

19.3 sec

mobiles.co.uk screenshot

About Website

Welcome to mobiles.co.uk homepage info - get ready to check Mobile S best content for United Kingdom right away, or after learning these important things about mobiles.co.uk

Compare and save on the latest and best mobile phone contracts, SIM Only deals, SIM Free Handsets, Upgrades & Accessories from award winning Mobiles.co.uk

Visit mobiles.co.uk

Key Findings

We analyzed Mobiles.co.uk page load time and found that the first response time was 587 ms and then it took 73.2 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster. Unfortunately, there were 60 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

mobiles.co.uk performance score

20

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.0 s

10/100

10%

LCP (Largest Contentful Paint)

Value8.2 s

2/100

25%

SI (Speed Index)

Value10.1 s

9/100

10%

TBT (Total Blocking Time)

Value3,130 ms

2/100

30%

CLS (Cumulative Layout Shift)

Value0.015

100/100

15%

TTI (Time to Interactive)

Value10.4 s

24/100

10%

Network Requests Diagram

mobiles.co.uk

587 ms

www.mobiles.co.uk

908 ms

gtm.js

1124 ms

mmcore.js

1501 ms

css

2199 ms

Our browser made a total of 76 requests to load all elements on the main page. We found that 13% of them (10 requests) were addressed to the original Mobiles.co.uk, 51% (39 requests) were made to Media.secure-mobiles.com and 9% (7 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (30.3 sec) relates to the external source Media.mobiles.co.uk.

Page Optimization Overview & Recommendations

Page size can be reduced by 957.7 kB (38%)

Content Size

2.5 MB

After Optimization

1.5 MB

In fact, the total size of Mobiles.co.uk main page is 2.5 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 25% of websites need less resources to load. Images take 1.4 MB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 119.5 kB

  • Original 137.1 kB
  • After minification 94.1 kB
  • After compression 17.6 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 43.0 kB, which is 31% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 119.5 kB or 87% of the original size.

Image Optimization

-10%

Potential reduce by 139.8 kB

  • Original 1.4 MB
  • After minification 1.3 MB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Mobile S images are well optimized though.

JavaScript Optimization

-64%

Potential reduce by 325.1 kB

  • Original 506.0 kB
  • After minification 467.4 kB
  • After compression 180.9 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 325.1 kB or 64% of the original size.

CSS Optimization

-86%

Potential reduce by 373.2 kB

  • Original 434.0 kB
  • After minification 328.3 kB
  • After compression 60.7 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Mobiles.co.uk needs all CSS files to be minified and compressed as it can save up to 373.2 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 5 (38%)

Requests Now

13

After Optimization

8

The browser has sent 13 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Mobile S. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

mobiles.co.uk accessibility score

70

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

ARIA input fields do not have accessible names

High

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

High

ARIA IDs are not unique

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

mobiles.co.uk best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

mobiles.co.uk SEO score

84

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Mobiles.co.uk can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Mobiles.co.uk main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

Open Graph description is not detected on the main page of Mobile S. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: