I'm not really into reviews and all that sort of things so don't be judging=)
Everyone who works in the digital field is looking for ways to improve their work processes and minimize risks.
A private mobile proxy is a great tool for working with social media and instant messengers. People use smartphones for Facebook, Instagram, etc. Social media are aware of this and therefore are loyal to the IP addresses of mobile providers.
The telecom providers have very few bunches of these IPs: a lot of people use thousands of addresses. The algorithms of social media are unable to block or flag such IPs because it will take effect on the huge number of customers.
As a SEO specialist, I use 4G Mobile IPs for work regularly. I've tried different providers like Proxy Guys, DSL Rentals, Storm Proxies, Proxy Army, etc. Well, some of them are stable, some not. Many providers are overpriced considering the service you get but I think DSL Rentals looks like kinda exception. Their service is worth every single dime.
I was surprised by the opportunity to change IP every minute. I've never had such a clean IP pool no matter what state I'm using. For all the time of usage, I've never faced the problem of black-listed IPs.
By the way, I've noticed they have Residential DSL lines as well if you need to work in a specific state or even city. Those proxies are not shared, but individual. Therefore when you buy a line you are the only user of a residential internet connection which is really cool.
I can recommend them if you're into SEO and all this marketing stuff.
Proxy providers that I used: