Product Variant Selection Not Working on any mobile devices

Store Design
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Topic summary

Core issue: Product variant dropdowns on a Shopify “Supply” theme site work on desktop but fail to respond on certain mobile devices, notably Samsung A50/A52 models.

Current findings:

  • Another participant tested on their device and confirmed the variant selection works, suggesting the problem is device-specific rather than site-wide.
  • The reporter verified the issue across multiple Samsung devices; initially thought it affected all mobile, but later narrowed it to a subset of devices.
  • No errors observed in the browser console during remote testing.

Scope/examples:

  • Multiple product pages are impacted, including examples provided (e.g., Milesight UG67 gateway, UR75 router, UC51x controller, EM500-UDL sensor, AM102 sensor).
  • Screenshots were shared, but they don’t reveal a clear error.

Outstanding questions:

  • Root cause remains unidentified (potential device/OS/browser-specific interaction with the theme’s variant script).
  • No confirmed fix or workaround yet; requester is seeking known bugs or theme-specific patches that ensure compatibility across all mobile devices.

Status: Ongoing, unresolved; further device-specific debugging or theme updates required.

Summarized with AI on January 12. AI used: gpt-5.
1

Hi There. We’re using the Shopify supply theme and for some reason, the product variant dropdown selection is not working on any mobile devices or tablets. It works perfectly on a PC or laptop but not on any mobile devices or tablets. The website URL is iot-store.com.au

Does anyone know how to resolve this critical issue?

1 Like
2

Hi @iotstore

It is actually working on my device. May I know what device are you using?

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3

Hi @Made4uo-Ribe , Thank you for your time and reply. That’s weird, It seems that some product variant selection is working. I’m testing with a few Samsung A50 and A52 series.
For example, the product variant selection is not working for any of these products:

https://www.iot-store.com.au/products/milesight-ug67-outdoor-lorawan-gateway

https://www.iot-store.com.au/products/milesight-ur75-5g-industrial-cellular-router

https://www.iot-store.com.au/products/uc51x-lorawan-wireless-solenoid-valve-controller

https://www.iot-store.com.au/products/milesight-em500-udl-lorawan-ultrasonic-distance-level-sensor

https://www.iot-store.com.au/products/milesight-am102-lorawan-temperature-humidity-sensor

There are more products that the variant selection doesn’t work on mobile, not sure what could be the reason and how to resolve it. Appreciate any help or hint to resolve this.

4

Sorry I do not have those device. Can you confirm if this problems are only to a certain devices? Maybe try some other device. I dont see any errors in the console either

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5

Hi @Made4uo-Ribe , thank you once again. You’re right it seems this issue is not for all mobile devices. I have tested on a range of Samsung devices and have the same issue with product variant selection not working. Initially, we thought it wouldn’t work for any mobile devices since we had only these Samsung devices on hand, but you’re right it’s limited to a range of devices. Do you know of any known bugs or fixes we can apply to resolve this issue for all mobile devices? Appreciate your time. Thanks.