t-mobile.pl

Readiness by lane

Green: t-mobile.pl. Thin bar: Telecommunications & Internet peer median.

Priority fixes for t-mobile.pl

Ordered by impact and by how common each practice is among peers.

1. Priority 1 · Accelerate

   HTTP/2 negotiated

   Observed: The TLS handshake selected HTTP/1.1 instead of HTTP/2.

   Why it matters: HTTP/2 sends many files over one connection, which speeds up pages with lots of images, styles and scripts.

   What to do: Enable HTTP/2 on your CDN or server. Most CDNs do this by default.

   72% of Telecommunications & Internet peers do this. Limit: Certificate and protocol were observed from one vantage point; CDNs can present different certificates by region.

   Guide: CDN Guide for Website Owners

2. Priority 2 · Harden

   HSTS kept for at least a year

   Observed: Strict-Transport-Security was sent with a max-age of 7 days, below the one-year benchmark.

   What to do: Send Strict-Transport-Security on HTTPS responses. Start with a short max-age (for example 300 seconds), confirm every subdomain works over HTTPS, then raise it in steps to 31536000. Add includeSubDomains only when all subdomains are HTTPS. HSTS preload is optional and hard to undo; hstspreload.org itself does not recommend it by default.

   On Next.js: Add the header in the headers() option of next.config.js for all routes.

   54% of Telecommunications & Internet peers do this.

   Guide: HTTPS and TLS Guide for Website Owners

3. Priority 3 · Enable

   Meta description written

   Observed: The homepage had no meta description.

   What to do: Write a short, specific description of the page for people, not a list of keywords.

   91% of Telecommunications & Internet peers do this.

   Guide: Meta Titles and Descriptions That Match Search Intent

4. Priority 4 · Enable

   Canonical URL declared

   Observed: The homepage did not declare a canonical URL.

   What to do: Add a self-referencing canonical link to every indexable page, using the final https:// URL.

   76% of Telecommunications & Internet peers do this.

   Guide: Canonical Tags: A Decision Guide for Duplicate URLs

What t-mobile.pl already does well

Practices fewer than half of Telecommunications & Internet peers use.

• Static files cached for 30 days or moreLong-lived caching on static files.41% of peers
• Content Security Policy presentContent-Security-Policy present.48% of peers

What we saw

Homepage checked

https://www.t-mobile.pl/

Homepage response

HTTP 200

TLS

TLSv1.3

Certificate

Deutsche Telekom Security GmbH, 197-day validity, expiring 2027-03-16

Platform or framework

Next.js

DNS operators

1 self-run or other nameserver domain

HSTS

max-age 7 days

DMARC policy

p=quarantine

Homepage HTML

1,045 KB, gzip

Images on homepage

31 (png 10, webp 3)

Limits: homepage only, one location, one moment. Header checks reflect the homepage response; other pages may differ.

Stack and providers

Seen in the homepage response, certificate and DNS. Provider pages compare how their customers configure the same checks.

All 31 checks

Select a gap for the method and fix. How each check works

Compare with other Telecommunications & Internet sites

• chatrwireless.com60
• movistar.com.mx61
• myrepublic.co.id61
• one.nz61
• vodafone.co.uk61

Telecommunications & Internet readiness benchmark