The Ultra Mobile Prepaid Phone Plan offers a compelling package with unlimited talk, text, and 15GB of 5G/4G LTE data on the T-Mobile network. However, user experiences vary widely, highlighting both strengths and significant drawbacks.

On the positive side, many users appreciate the plan's affordability and extensive coverage. The ability to make unlimited calls to over 90 international destinations and free calls to Mexico and Canada is a standout feature. Some users reported seamless activation and excellent service quality within the United States.

However, several issues have been raised. A major point of contention is the misleading advertising regarding data limits. While the packaging claims 'unlimited data,' the fine print reveals a cap of 3GB for high-speed data, leading to confusion and frustration among users. Additionally, activation can be cumbersome, requiring manual adjustments to Access Point Names (APN) settings.

Customer service has also been a sore point. Users report long wait times during chats with representatives who seem to handle multiple queries simultaneously without transparency. Some users experienced abrupt disconnections from support chats without resolution.

International performance is inconsistent. While some travelers enjoyed reliable service in countries like Colombia and Venezuela, others faced connectivity issues, particularly with text messages not functioning properly abroad.

In summary, while Ultra Mobile offers an attractive plan for domestic use with some international perks, potential buyers should be wary of data limitations and prepare for possible activation hassles and variable international performance.