Email vs Mobile Number?

Which one are the most important? Email or mobile number? I’ve seen facebook do let user choose either to register to use mobile number or email. Any Ideas?
Currently I’m doing registration for parents and students….
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Digital Services Performance Measurement Framework for measuring and monitoring user experience

From the framework developed by GSA’s Digital Services Innovation Center that aims to:
identify a common approach to collect standard data, and enable
aggregation of this data
The framework is based on the following types of measures:
B…
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Database ID auto Increment

I’m building a CMS Admin Panel to show Data.
I’m considering the ID column.
Which one is more compatible for user?
The Pretty Auto Increment
Neat Number but hardly refer the ID for searching
# name data
1 Billy Test
2 Jason Test
3 Sar…
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Does visual design really affect UX?

I am really concerned about the effects of visual design on user experience, but as this may seem too broad, let me clarify it a little.
My statement is that, if the user can find the information he or she needs, because of thoughtful in…
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Is it good to automatically sign up a user if he doesn’t have an account?

On some sites when you don’t have an account, you are asked: "Sign in with Gmail" or "Sign in with Facebook". When you click and your account isn’t found, it automatically signs you up using the selected social network,…
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"I agree" check box or buttons

I’m designing an application which allows the users to sign up if they agree to the terms and conditions.
If the user agrees to the terms and conditions, sign-up process will be successful and the user proceeds to the next screen as regis…
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iOS using tabs in modal view to show camera/multiple photo galleries

In our app there are many pages of forms, and each page can have (or requires) photos attached to them. Photos can come from the camera, photos previously taken, or a view of certain photos from the iOS photo gallery. I don’t have room for…
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Checkout system with offline payments

I’m trying to find the best way to handle offline payments (e.g. internet bank transfer) into a site which offers services like courses.
At present there is a course registration form, when successfully completed the user receives a confi…
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What symbol can be used to denote "contains"

Our UI has a table of data, with the first row containing input fields in each column for searching based off the data in that column. We want to add a dropdown that determines how that search text is used. We want to be able to do the fol…
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Different ways of entry points in a form or one way?

So I am trying to digitalise a business form for my client.
I will quickly explain the workflow:
User fills a form which has:
shipping address
payer address
billing address.
2.They create a new form for each shipping address they ha…