Vivo Z3 VS Sony Xperia Z1 Compact

Phone battery can be either removable or non-removable. The main advantage of a non-removable battery is that the overall device tends to be thinner while the removable battery can be easily replaced

For how long can the phone play music continuously before draining the battery if it is used solely to play music

For how long will the phone battery charge last if the phone is left powered on without doing any activity

For how long can you continuously talk on the phone, not doing any other activity, before the battery drains

The materials used to build the outer body of the phone including the bezels like glass, stainless steel, plastic, aluminium, etc...

The length x width x depth (thickness) of the phone in millimetre and inch

The type of the physical keyboard in case the phone has one

How many SIM cards does the phone allow and their sizes (mini, nano, etc...)

The weight of the phone alone, not including other components of the package or the package itself, in gram and ounce

The technical specs of the lens of the primary camera of the phone like the number of pixels or the aperture

In case the primary camera of the phone has two lenses, the technical specs of the lenses like the number of pixels or the aperture are displayed below

In case the primary camera of the phone has three lenses, the technical specs of the lenses like the number of pixels or the aperture are displayed below

The features of the primary camera of the phone that gives it a competitive edge over its competitor

Does the primary camera of the phone allow shooting videos? What are the technical specs of the videos shot? Like the quality of the videos at different frames per second (fps) values

The technical specs of the lens of the front camera of the phone like the number of pixels or the aperture

In case the front camera of the phone has two lenses, the technical specs of the lenses like the number of pixels or the aperture are displayed below

In case the front camera of the phone has three lenses, the technical specs of the lenses like the number of pixels or the aperture are displayed below

The features of the front camera of the phone that gives it a competitive edge over its competitor

Does the front camera of the phone allow shooting videos? What are the technical specs of the videos shot? Like the quality of the videos at different frames per second (fps) values

Does the phone have Bluetooth? Which version and the specs related to it

Is the phone GPS enabled? What global satellite-based navigation systems does it support?

Does the phone have an Infrared port? If the phone supports Infrared, it can exchange data with other Infrared enabled phones and can be used as a remote control to control other devices like televisions and air conditioners using different apps

Does the phone support NFC? The main uses of Near-Field Communication in phones include but not limited sharing data like photos and videos with other NFC enabled devices and for quick retail payments in a fashion similar to credit cards

Does the phone contain an actual radio transmitter? What technologies does the transmitter support like FM, AM, Radio Data System (RDS), etc... Radio enabled devices can broadcast actual radio stations for free (no internet connection required)

Does the phone have a USB port? What is the version of the USB? Is it proprietary or standard? etc...

Does the phone support Wireless Lan? What are the specs and the features of the Wi-Fi?

Does the phone support multi-touch? Up to how many fingers?

What are the display protection technologies that the phone supports? Like corning gorilla, oleophobic coating, etc...

What is the resolution of the phone display and its aspect ratio?

The size of the phone display in cm and inch and the ratio of the display to the body in percent

Popular display types include In-Plane Switching (IPS), Thin Film Transistor (TFT), and Active-Matrix Organic Light-Emitting Diode (AMOLED). Colors are brighter in AMOLED displays and blacks are darker. IPS screens are cheaper to produce and display natural colors while AMOLED colors tend to be over-saturated. IPS displays the whites better but has poor viewing angles while whites in AMOLED tend to be little bit yellowish but the viewing angles are better. IPS is preferred by photographers for the natural colors while AMOLED is preferred for everyday regular users. IPS improves on the old TFT technology like Super AMOLED improves on AMOLED

Does the phone have a built-in alarm feature?

Does the phone have a pre-installed internet browser app? What technologies does it support?

Does the phone have a pre-installed clock app?

Does the phone have pre-installed games? If yes, how many and what are they? Does it support downloading new ones?

Does the phone support Java? What is the version of the Mobile Information Device Profile installed?

How many languages does the phone support and what are the major ones?

What are the messaging technologies pre-configured on the phone?

What are the sensors built into the phone?

When was the phone introduced to the public? What is the release date?

What is the status of the phone? Is it available for sale or was it discontinued? When was the phone released?

What is the size limit of the call log of the phone or in other words the maximum number of the dialed, answered, and missed calls?

Does the phone accept an external memory card? What is the maximum allowed storage space for the card?

What is the internal storage space of the phone? How much Random Access Memory (RAM) does it have?

How many contacts can the phone save if any? Does it support photo or video calls?

What are the available colors for the phone?

What is the current price for the phone?

Specific Absorption Rate (SAR) is a measure of the rate at which energy is absorbed by the human body when exposed to a radio frequency electromagnetic field. The SAR limit set by the FCC/IC is 1.6 watts per kg averaged over 1 gram of actual tissue. Above that would be dangerous to human health

The SAR limit recommended by the Council of the European Union is 2.0 watts per kilogram averaged over 10 grams of actual tissue. Above that would be dangerous to human health

What are the 2G (second-generation) frequency bands supported by the phone? Three primary benefits of 2G networks over their predecessors were that phone conversations were digitally encrypted, 2G systems were significantly more efficient on the spectrum, enabling far greater wireless penetration levels, and 2G introduced data services for mobile like SMS and MMS

What are the 3G (third-generation) frequency bands supported by the phone? 3G was an upgrade for 2G and 2.5G GPRS networks, for faster internet speed. 3G finds application in wireless voice telephony, mobile internet access, fixed wireless internet access, video calls, and mobile TV

4G is the fourth generation of broadband cellular network technology, succeeding 3G. Potential and current applications include amended mobile web access, IP telephony, gaming services, high-definition mobile TV, video conferencing, and 3D television

Enhanced Data rates for Global Evolution (EDGE) is a digital mobile phone technology that allows improved data transmission rates as a backward-compatible extension of GSM. EDGE is considered a pre-3G radio technology

In 2G systems, General Packet Radio Service (GPRS) provides data rates of 56–114 kbit/second. 2G cellular technology combined with GPRS is sometimes described as 2.5G. It provides moderate-speed data transfer and is integrated into GSM Release 97 and newer releases

What is the maximum network speed, download and upload in mega bits per second (Mbps), allowed by the phone?

What are the network technologies supported by the phone?

What is the chip installed on the phone? Popular System On Chip (SoC) brands include Qualcomm and MediaTek

What is the Central Processing Unit (CPU) installed on the phone? How many cores and what is the clock rate per core (used as indicator for the processor's speed)?

What is the Graphics Processing Unit (GPU) installed on the phone? Popular brands include Adreno by Qualcomm and Mali by ARM

What is the Operating System of the phone? The major ones are Android, iOS, and Windows Phone

Does the phone have a 3.5mm port? This port is standard in the audio industry so having it is a great advantage as it allows for a large number of after market headphones instead of being limited to proprietary products by the phone brand

What kind of hardware notifications are supported by the phone?

Does the phone have a built-in loudspeaker?

The audio quality of the phone is determined based on the signal-to-noise ratio, the higher the value, the better, and stereo crosstalk which is a measurement of the isolation between the right and the left audio channels. The lower the value, the better in this case as a high value means there is a leakage of signal from one channel to the other and the stereo effect would be decreased. Both values are reported in Decibel (dB) unit

The most important test for examining the quality of a phone display is the Contrast Ratio which is the difference between the brightest white and the darkest black of the display. A good screen should display the bright colors as bright as possible and the dark colors as dark as possible. For the Contrast Ratio to be tested accurately and fairly, it should be under the sunlight as the sunlight heavily influences the colors so if a display keeps a high Contrast Ratio value while the sunlight is projected on it, that means it's a pretty much good display

The loudspeaker of the phone is tested for the loudness of voice, pink noise, and ringing tones. Pink noise is the background noise you encounter a lot in everyday life like the sound of a fan spinning or a moving train. The values are measured in Decibel (dB) unit and the higher the values, the louder and better the loudspeaker is

What is the Basemark score(s) of the phone? Basemark is the most popular benchmarking tool in the world for the evaluation of the performance of a cell phone. Basemark OS II is the overall performance score of the phone on a systemic level while Basemark X evaluates the gaming and graphics performance of the phone. The higher the value, the better