Can subscription on mobile phone also be used on laptop?

Hello Liz.
We'll certainly clarify this.
You have an active subscription of AVG Ultimate for Android. This includes AVG Secure VPN for 5 Android devices. However, it cannot be extended to Windows devices.
Had you purchased AVG Secure VPN Multi - Device, it can be installed on Windows, Android, Mac and iOS devices (5 active connections simultaneously).

Hi, I have subscribed on my mobile phone to AVG VPN and thought I could use the activation code on my laptop, but it won't accept it as valid. Have I done this the wrong way round? Should I have subscribed via my laptop first? My mobile is Android and my laptop is Windows 10

Thank you Avinash. Is it possible to cancel the subscription I have and swap it to the AVG Secure VPN Multi-Device? How much would that cost?

Hello Liz.
We'll certainly clarify this.
You have an active subscription of AVG Ultimate for Android. This includes AVG Secure VPN for 5 Android devices. However, it cannot be extended to Windows devices.
Had you purchased AVG Secure VPN Multi - Device, it can be installed on Windows, Android, Mac and iOS devices (5 active connections simultaneously).

Liz, unfortunately, it is not possible to swap the subscription.
I'd recommend to reach our sales team (https://support.avg.com/support_sales?l=en) to know about ongoing offers and possible discount to buy AVG Secure VPN Multi - device.