Given the following obstacle, is it possible to crack this type of phone (description and details inside)?

Quotations from Sherlock:
Four additional units wired inside the casing, [...] containing acid or a small explosive. Any attempt to open it will burn the hard drive. There will be two passcodes, one to open the phone, one to burn the drive. Even under duress, you can’t know which one is given and there would be no second attempt. (note: destroying it? NOPE :-) ) Unless there are lives of British citizens depending on the information you burn. Are there?
What do you guys think? Give me your best shots. Oh, I will post this question on social, but I prefer long answers. Thanks in advance! :-3