Ultra Mobile's $29/month prepaid phone plan offers unlimited talk, text, and 10GB of 5G/4G LTE data on the T-Mobile network. This plan is particularly appealing for frequent travelers, as it includes unlimited talk to over 90 international destinations and additional benefits for Mexico and Canada.

However, user experiences vary significantly. Some users report seamless activation and excellent service quality, especially within the United States. The ability to make free international calls is a standout feature that many appreciate.

On the downside, several users have encountered issues with misleading advertising regarding data limits. The packaging claims 'unlimited data,' but the fine print reveals a cap at 3GB of high-speed data. This discrepancy has led to frustration and complaints about false advertising.

Technical difficulties are another common complaint. Users have reported complicated setup processes, problems accessing voicemail without resetting network settings, and inconsistent service quality abroad. Customer service experiences have been largely negative, with long wait times and unhelpful responses.

Despite these challenges, some users find the plan to be a cost-effective solution for staying connected while traveling internationally. The option to add additional data in specific countries like Mexico is a plus for those needing more extensive coverage.

In conclusion, while Ultra Mobile's prepaid plan offers attractive features for international travelers, potential buyers should be wary of the possible technical issues and discrepancies in advertised services. It's advisable to thoroughly research and possibly test the service before committing long-term.