Bests & Worsts Reviews from Amazon

This is probably the best deal you'll get on a T-Mobile nano sized SIM (other than the occasional free ones directly from T-Mobile). In the box you get the nano SIM of course, along with two nano SIM card adapters all for just $5 (at the time of this review, 2/13/15)! The two adapters are: nano to standard size SIM, and a nano to micro size SIM. They're made of a black durable plastic that resembles the highly rated Sadapter Three Adapter Pack - Retail Packaging - Black found here: http://www.amazon.com/Sadapter-Three-Adapter-Pack-Packaging/dp/B00EOABX5S I was currently using a micro sized SIM in my iPhone 4s and wanted to change it to a nano size SIM since I like switching phones every few days. I used the included nano to micro SIM adapter and the fitment was perfect in my iPhone 4s! (It worked well in my Nexus 4 too) I will now be purchasing this kit in the future if I need additional adapters: $5 for a nano SIM and two adapters compared to $15 for a nano SIM from the T-Mobile website without any adapters. The only thing missing in this kit compared to the SAdapter three pack kit is that this T-Mobile SIM Starter Kit does not include the micro to standard size adapter. You're covered though since a nano to standard adapter is included (assuming that you're already using the nano SIM). Changing SIM cards couldn't be any easier. The inside flap of the box states that if you're on a postpaid plan such as the Simple Choice Plan, you would need to call and speak with someone from T-Mobile customer care to make the switch. You actually could just call the dedicated SIM card activation line at 1-877-234-4299 and enter or speak your SIM card number to the automated machine and have the switch done in minutes without having to wait for a live representative. Couldn't recommend this enough! A definite 5 stars! UPDATE 4/9/15: Was able to try the nano SIM along with the adapters in several more phones/tablets (some of which I own, some from friends/family) and they worked/fit well: - iPhone 3G - iPhone 5 - iPhone 6 Plus - Amazon Fire Phone - OnePlus One (both nano and micro SIM trays) - Nexus 5 - Nexus 6 - Nexus 7 tablet (for fitment) - iPad 3rd generation tablet (for fitment) UPDATE 8/11/15: Nano SIM and adapters are still working perfectly! For those frugal shoppers out there, keep checking Amazon as well as the T-Mobile website. They recently ran a promotion for this exact same kit for $0.99 using the promo code SIM99. Was able to pick up a few more to switch my entire family over to Nano SIM cards. This will hopefully future-proof us from having to buy another SIM card for a while until they come up with an even smaller one? :) Still highly recommended!