As the title suggests. I purchased a Pixel 3 recently and after transferring my SIM and settings from my iPhone 8 the speeds seem to have throttled and reduced significantly. I've reinstalled APN settings numerous times and even changed the MVNO field to 'None' to which the speeds instantly shot to over 100Mbps. Unfortunately the MVNO setting defaulted back after a few seconds and I am back to sub 20Mbps off the same site at the same time. I therefore conclude the reduction in speed is due to this APN setting.
I'm in an area with Carrier Aggregation and previously using my iPhone 8 I was getting 100Mbps plus, however the same SIM in the Pixel 3 proves to be somewhat throttled. Please could someone look into this for me?