With the T-Mobile One Plus add-on, $25 extra will get you HD video and unlimited LTE mobile hotspot

Last week, T-Mobile surprised a lot of people by introducing a new and rather controversial unlimited plan. In the days that have passed since the T-Mobile One plan was officially unveiled, numerous wireless service subscribers and net neutrality groups have criticized the plan for two of its fine prints: videos limited to 480p and mobile hotspot usage at 128Kbps. In what's likely an attempt to calm waters, T-Mobile today has announced several modifications to the T-Mobile One plan.

One of the changes affects mobile hotspot usage, as the carrier has boosted the speed of unlimited mobile hotspot to 512Kbps. With the initial T-Mobile One plan, the carrier promised unlimited mobile hotspot usage at a speed of 128Kbps. That's four times the initially announced speed, and something that many future T-Mobile One subscribers will surely appreciate. 

T-Mobile also announced that it will offer HD passes for $3 for 24 hours. What this means is that customers will be able to stream as much HD video as they want for 24 hours after activating the $3 add-on.

The biggest news from T-Mobile today is the introduction of a T-Mobile One Plus add-on. Costing $25 per month for each line, the add-on includes unlimited mobile hotspot data at LTE speeds as well as an unlimited number of HD passes. The interesting bit is that users will have to activate each one individually; in 24 hours, the HD pass will expire and video streaming will return to 480p quality.