Recently batllle.net could not read my phone number. Now it is ebay.
While battle net asked me to enter a valid phone number, ebay go a step further – they ask me to:
Please remove invalid characters
1. The message does not tell me which characters are invalid. I guess, the + sign.
2. Since the message speaks in plural “characters”, I am confused as to what other characters beside the plus sign might be invalid.
3. The site does not recognize a perfectly legitimate formatting of a phone number. Most software systems will accept only phone numbers beginning with a +.
Overall, the text is OK, yet not very helpful.
Quick and dirty: Explain which characters are invalid. Or tell me which ones are valid and will know that the rest are not.
Design for humans: Recognize and accept variations in formatting. For example, all of the following are the same number 0035988, +35988, ++359-88, 359 88 and the software can be programmed to recognize them as such.
20 July 2015 | eBay