Not all MVNOs are deprioritized. Many are, but the Reddit thread mentioned in a sibling comment outlines it well.
Been with Verizon Wireless for 20 years. Got sick of how expensive their entry level 5G plan was with deprioritized data. Switched to US Mobile a few months ago. Half the price month-to-month, good prioritized data pool (35GB), and 5G UW access.
The US Mobile CEO is active on their subreddit and is attempting interesting things, such as allowing you to port between 2 major carriers (and soon all 3) up to 8 times a month as needed, and a beta of dual carrier coverage at a reduced price.
Been with Verizon Wireless for 20 years. Got sick of how expensive their entry level 5G plan was with deprioritized data. Switched to US Mobile a few months ago. Half the price month-to-month, good prioritized data pool (35GB), and 5G UW access.