Hello, Thank you for your inquiry. After reviewing the specifications of the iplay 50 mini tablet, I can confirm that it supports the following frequency bands for cellular connectivity:

• GSM: B2/3/5/8
• WCDMA: B1/2/5/8
• FDD: B1/2/3/5/7/8/20/28AB
• TDD: B38/40/41

Based on this information, the iplay 50 mini tablet should be compatible with T-Mobile's network in the US, as T-Mobile uses the following frequency bands:

• GSM: B2/4/5/8
• WCDMA: B1/2/4/5/8
• LTE: B2/4/5/12/25/26/41/66/71

However, it's important to note that compatibility can also be influenced by other factors such as the specific version of the tablet you purchase and the availability of T-Mobile's network in your area. Therefore, it's recommended that you verify the compatibility with T-Mobile prior to making your purchase. I hope this information is helpful. If you have any further questions or concerns, please do not hesitate to ask.

Hello there, Regarding your inquiry about the iPlay 50 Mini tablet, unfortunately, the stylus pen does not detect pressure. As for the speakers, the iPlay 50 Mini tablet only has a mono box speaker, so it doesn't offer stereo sound. However, you can still enjoy audio playback on the tablet, but the sound quality may not be as immersive as you'd get with a stereo setup.

Thank you for getting in touch with us! Based on the information available, the iPlay 50 mini tablet is equipped with LPDDR4X RAM and UFS 2.1 ROM. If you have any other questions or concerns, please don't hesitate to let us know. We're always here to help!