Mobile site looks like desktop - how to fix this?

Shopify Plus

Topic summary

A Shopify Plus store using a third-party theme is experiencing a mobile display issue where the site renders in desktop view when accessed on phones.

Key details:

  • The mobile preview appears correct in the Shopify backend
  • No theme code modifications were made before the issue appeared
  • The problem only occurs on live mobile devices

Current status:

  • Another user has requested the store URL to diagnose the issue
  • The discussion remains open with no solution yet provided
Summarized with AI on October 31. AI used: claude-sonnet-4-5-20250929.
1

we currently use a third party however have noticed that our mobile site when viewing on live on a phone is shwoing as desktop - it worked fine in the backi end and we have not adjusted and theme code

2

It’s difficult to say anything without looking at the store, can you share the website URL?