Very slow internet speed despite high-speed tariff

Hello,

I have a mobile plan with O2 (around €45/month for 2 SIM cards), which is supposed to provide high-speed internet access.

However, I am only getting around 15–20 Mbps, while two of my colleagues with similar plans and similar pricing are achieving 300–385 Mbps.

I have already tried the following:

• Restarting my device
• Testing the SIM card in another phone
• Changing locations within the city

Unfortunately, the speed remains consistently low.

I would kindly ask you to check my line or SIM configuration, as there may be an issue such as throttling, incorrect provisioning, or network assignment.

Thank you in advance for your support.