Grameenphone quietly rolled out its 013 series of numbers and it wrecked everything. No web service, including Google is working with this 013 series of numbers. Its time for developers to fix this mess and update every validation logic you may have for validating mobile numbers or MSISDNs.
I enlisted a few RegExps for de-terrorizing you, even if a bit.
Enough reading, update your RegExps now!