KnowRoaming appears to be a legitimate service, offering eSIM and global SIM card solutions for international travelers. Reviews are mixed, with some users praising the ease of setup and affordable data packages, while others report issues with connectivity and customer service. The company has a Trustpilot rating of 3.0 based on 31 reviews, with 71% of users giving it a one-star rating. Some users have had positive experiences, particularly with the eSIM service, but there are also complaints about inconsistent performance and lack of support. Overall, KnowRoaming seems to offer a convenient option for travelers, but potential users should be aware of the mixed feedback.