Samsung Galaxy S Duos

The Samsung Galaxy S Duos, model number GT-S7562, is a mid-range Android smartphone announced in July 2012 and released in September of the same year.

As indicated by the "Duos", this phone has two SIM card slots. Its hardware is not related to any Galaxy S series flagship though.

S Duos
Source:
 * GT-S7562C: Chinese version released exclusively on China Unicom. Runs Android 4.1.2 instead of 4.0.4.
 * GT-S7562i: Another Chinese model. Runs Android 4.0.4. Both unbranded and China Unicom versions exist.
 * GT-S7562L: Latin American variant, also has a Movistar branded version.
 * GT-S7566: Unbranded Chinese variant.
 * SCH-i809: Chinese variant released on China Telecom.

Trend / Ace II x
Single-SIM version of the S Duos with mostly(?) identical hardware. Uses the S7562's FCC ID and has S7562 written on the board and other parts.

The phone still has two SIM card slots, but the bottom one is hidden under the plastic cover. Maybe the second card slot can be activated by flashing S7562 firmware.

Source:


 * GT-S7560: Released in Europe and Africa, called the Galaxy Trend.
 * GT-S7560M: Released in North/South America and Australia, called the Ace II x.
 * GT-S7568: China Mobile variant.
 * SCH-i699: China Telecom variant.
 * SCH-i699i: Another China Telecom variant. Released later than the i699, but still runs Android 4.0. Unknown differences.

Related phones

 * Samsung Galaxy Trend Lite: Successor with lower end specs, such as downgraded RAM and camera. Runs Android 4.1.
 * Samsung Galaxy Trend Plus: Successor with higher end specs, including a dual-core processor. Runs Android 4.2.

Batteries

 * Samsung EB-L1M7FLU (3.8 V, 1500 mAh Li-ion)
 * Samsung EB425161LU (3.8 V, 1500 mAh Li-ion)

Chargers
Any microUSB charger