T-Mobile launched last January 22, 2014, the Sony Xperia Z1s, tagged with a full retail price of US$ 528.00, with zero upfront fees.
The Android phone is T-Mobile’s slightly modified variant of the Sony Xperia Z1, which was recently released to the international market and which was previously known as the Sony Xperia Honami, its internal codename.
The full retail price of the T-Mobile Xperia Z1s is amortized into 24 payments (2 years), so the monthly installment for the handset is just US$ 22.00. On top of this monthly device fee is the monthly service fee, which varies according to plan.
A SIM Starter Kit worth US$ 10.00 is also required upon purchase of the T-Mobile Xperia Z1s.
T-Mobile offers basic service for US$ 50.00 monthly. This is the lowest-priced plan from the carrier and includes unlimited talk/text/web on the T-Mobile network, as well as up to 500 MB of high-speed data and international roaming.
For only US$ 72.00 a month (which covers both the monthly device fee and monthly fee for the lowest plan), subscribers can avail themselves of both the T-Mobile basic service and the new Sony Xperia Z1s.
Needless to say, the Sony Xperia Z1s is networked locked to T-Mobile. But, if you want the same type of Android phone but without being tethered to a specific carrier, you’d probably want the international unlocked variant — the Sony Xperia Z1 (Honami).
The T-Mobile phone differs from the Xperia Z1 primarily in appearance (e.g., plastic frame, some slight visual differences in the exterior) and in the amount of internal storage. The Sony Xperia Z1s has 32 GB of internal storage, which is twice than what the Sony Xperia Z1 (Honami) has.
Apart from those differences, both the Sony Xperia Z1 and the T-Mobile Xperia Z1s are powered by a quad-core Snapdragon 800 MSM8974 processor ticking at 2.2 GHz, 2.0 gigabytes of RAM, and 3,000-mAh Li-ion battery (for up to 15 hours of talk time or 600 hours on standby). The Xperia Z1s also has a slot for expandable storage up to 64 GB.