The Titanuim S1 Plus is a dual-SIM (3G+2G) smartphone that runs Android 4.3 Jelly Bean. It comes with a 4-inch display with a WVGA (480x800 pixels) resolution.
A quad-core processor (unspecified chipset) powers the smartphone, clocked at 1.2GHz, and coupled with 1GB of RAM. The Titanium S1 Plus sports a 5-megapixel rear camera with LED flash, while there is a 0.3-megapixel front-facing camera also onboard.
The handset comes with 4GB of inbuilt storage, which can be expanded via microSD card (up to 32GB). The connectivity options included in the Karbonn Titanium S1 Plus are 3G, GPRS/ EDGE, FM radio, Wi-Fi, Bluetooth, and GPS. It is backed by a 1500mAh battery.
The Karbonn Titanium S9 Lite features dual-SIM (GSM+GSM) support and runs Android 4.2 Jelly Bean. Other specifications include 5.5-inch qHD display; 1.3GHz quad-core processor; 512MB of RAM; 8-megapixel rear camera; 2-megapixel front camera; 4GB inbuilt storage (expandable up to 32GB via microSD card), and 2100mAh battery.
The Karbonn A99i, on the other hand, is also a dual-SIM (GSM-GSM) smartphone and runs on the now-dated Android 4.2 Jelly Bean. Featuring a 4-inch display with unspecified resolution, the Karbonn A99i runs on a 1.3GHz dual-core processor (unspecified chipset) that is coupled with 512MB of RAM.