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Mmmmmmmm I'm gonna need some more information than that.<br />
<br />
&gt;&gt;&nbsp;credit card processing hardware that attaches to an android cell phone.<br />
What is the credit card processing hardware? &nbsp;Make/model<br />
What is the Android cell model?<br />
<br />
&gt;&gt;&nbsp;why doesn't it work<br />
Need to know if there is an error of some sorts. &nbsp;Need more information to try and reproduce the issue you're experiencing.
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Mmmmmmmm I'm gonna need some more information than that.

>> credit card processing hardware that attaches to an android cell phone.
What is the credit card processing hardware?  Make/model
What is the Android cell model?

>> why doesn't it work
Need to know if there is an error of some sorts.  Need more information to try and reproduce the issue you're experiencing.

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I'm presuming the other person has the Android phone and the credit card application.<br />
<br />
Possibly dirty card or worn magnetic stripe (on the card) would be my guess as to why it doesn't work.
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I'm presuming the other person has the Android phone and the credit card application.

Possibly dirty card or worn magnetic stripe (on the card) would be my guess as to why it doesn't work.

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In most situations, use of iPhone is a better choice in term of security and compliance with the credit card companies or banks. <br />
<br />
If the merchant uses an Android phone for attaching to a credit card reader to process payment, I will not give my credit card for payment.
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In most situations, use of iPhone is a better choice in term of security and compliance with the credit card companies or banks.

If the merchant uses an Android phone for attaching to a credit card reader to process payment, I will not give my credit card for payment.

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I have not used hardware/software but seen others use hardware software. Upon thinking again, I realize that this answer gives me the most insight to a problem I have seen but not actually diagnosed.
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I have not used hardware/software but seen others use hardware software. Upon thinking again, I realize that this answer gives me the most insight to a problem I have seen but not actually diagnosed.

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credit card processing hardware that attaches to an android cell phone.<br />
<br />
I am the customer and I usually just give cash after watching merchant trying to use hardware/software <br />
<br />
why doesn't it work
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credit card processing hardware that attaches to an android cell phone.

I am the customer and I usually just give cash after watching merchant trying to use hardware/software 

why doesn't it work

why doesn't hardware work

The iPhone is a smartphone made by Apple Inc. It and the iPad, along with several other mobile devices from Apple, run on the iOS operating system, which has its own topic, as does the iPad for device-specific questions. Native iOS applications are written in Objective-C or in Swift using the Cocoa Touch frameworks or HTML5 compiled with the help of a package manager such as Adobe PhoneGap; a common IDE is Xcode.

iPhone

Electronic commerce (e-commerce) is the trading in products or services using computer networks, such as the Internet. E-commerce draws on technologies such as mobile commerce, electronic funds transfer (EFT), supply chain management, online transaction processing, electronic data interchange (EDI), inventory management systems, and automated data collection systems. Use this topic to discuss online shopping carts, online marketplaces, and e-commerce platforms.

E-Commerce

A cellular phone (also known as a mobile phone, cell phone, hand phone, or simply a phone) is a telephone that can make and receive telephone calls over a radio link while moving around a wide geographic area by connecting to a cellular network provided by a mobile phone operator, allowing access to the public telephone network. Mobile phones that offer services such as text messaging, email, Internet access, business applications, gaming, photography and more general computing capabilities are referred to as smartphones.

Cell Phones

Hardware includes cell phones and other digital living devices, tablets, computers, servers, peripherals and components, printers and scanners, gaming consoles, networking hardware such as routers, hubs, switches and modems, storage devices and security equipment such as firewalls and other appliances.

Hardware

Android is a mobile operating system developed by Google, based on the Linux kernel and designed primarily for touchscreen mobile devices such as smartphones and tablets. Android's user interface is based on direct manipulation, using touch gestures that loosely correspond to real-world actions, such as swiping, tapping and pinching, to manipulate on-screen objects, along with a virtual keyboard for text input. In addition to touchscreen devices, variants of Android are also used on notebooks, game consoles, digital cameras, televisions, automobiles and other electronics. Applications are usually developed in Java programming language using the Android software development kit (SDK), but other development environments are also available, including Delphi, Ruby and Visual Studio (using C++).

Android

iOS is a mobile operating system developed by Apple; it is a derivative of the Mac OS X desktop operating system, with which it shares many (but not all) common frameworks and other components. These include Cocoa Touch, the Mach/Darwin/XNU kernel and code from the Berkeley Software Distribution (BSD). Each iOS application runs in its own secure sandbox to prevent altering other applications, the operating system, or any other data.

Security is the protection of information systems from theft or damage to the hardware, the software, and the information on them, as well as from disruption or misdirection of the services they provide. The main goal of security is protecting assets, and an asset is anything of value and worthy of protection.  Information Security is a discipline of protecting information assets from threats through safeguards to achieve the objectives of confidentiality, integrity, and availability or CIA for short. On the other hand, disclosure, alteration, and disruption (DAD) compromise the security objectives.