Not everything went planned
1. Design constraints
This redesigning solution leans heavily from a user perspective. Though through the design process, I took consideration such as maintaining the same Popups design components and follow the branding of US mobile as much as I can. Design should also take perspectives from other shareholders like programmers and the product team. Therefore, I understand some assumptions that I made may not be reasonable since it was hard for me to set such constraints without other teams playing. (For instance, a double confirmation design may not be beneficial from a business perspective since it might give users time for second thoughts in the case of upgrading their plans)
2. Left less time for testing
Due to time constraints, I didn't have much time to test my design solutions with a real US mobile user. Therefore, I went the design critique of this task from myself to iterate solution. If the time allows, I will take feedback from other designers or users, because they always inspire me with things I overlook.