The Karbonn K451+ Sound Wave operates on the GSM network technology with support for GSM 900/1800 on both SIM 1 and SIM 2. This device includes basic GPRS for data connectivity, although it does not support EDGE. Given its 2G network capability, it was fairly suitable for basic telecommunication needs and simple internet usage during its time.
Announced in 2012, the Karbonn K451+ entered the market as a basic feature phone, designed to cater to users who required essential mobile communication capabilities. However, over time, it has been discontinued, as newer models with advanced technologies emerged.
The phone's dimensions are 116.5 x 51.9 x 14.6 mm, which makes it compact and easy to handle. While the exact weight is unspecified, its size and design ensure that it fits comfortably in the user's hand and pocket. The dual SIM feature, supporting Mini-SIM, adds convenience for users with more than one network provider.
Equipped with a 2.4-inch TFT display, the Karbonn K451+ offers a resolution of 240 x 320 pixels and supports 65K colors. This screen size and resolution were standard for feature phones at the time, offering a basic yet functional visual experience adequate for the phone's capabilities.
Although the phone does not have internal memory storage specified, it includes a microSDHC slot, allowing users to expand the phone's storage capacity to accommodate additional files and media. The phonebook can hold up to 500 entries, and users can maintain a record of their call logs, which also enhances the phone's utility.
The Karbonn K451+ features a single 1.3 MP main camera, offering the ability to capture photos and videos. While not comparable to modern smartphone cameras, it provides basic photography capabilities for users seeking to capture moments on the go.
For entertainment, the phone includes a loudspeaker and a 3.5mm headphone jack, enabling users to listen to music and audio with or without headphones. FM radio with recording capability further extends its multimedia features, allowing users to enjoy radio broadcasts and save them for later listening.
The phone does not support Wi-Fi, but it compensates with Bluetooth 2.0 for connectivity and file sharing. There's no support for modern smartphone features such as GPS, but a microUSB port is available for charging and data transfer.
As a feature phone, the Karbonn K451+ supports messaging services like SMS and MMS. Moreover, it includes basic games for user engagement and supports Java applications, which was a common feature in phones from that era.
The device is powered by a Li-Ion 1800 mAh battery, offering a standby time of up to 500 hours and a talk time of up to 8 hours. This substantial battery life is a key aspect for users who require prolonged use without frequent recharging.
Available in a standard color scheme of Silver/Black, the phone also had a SAR EU rating of 0.45 W/kg (head), signifying compliance with safety standards regarding exposure to radio waves. Priced at approximately 20 EUR at launch, it was an affordable option for budget-conscious users seeking basic mobile functionality.
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