So, "Some advice" or "some advices"? Which is correct?

Solution 1:

As noted, advice is uncountable so it takes no plural form. In the following extract from "Oxford dictionaries", however, they hint at a legal/business usage of advice as a countable noun.

Taking and giving advice

• The central difference between advice and advise is that the spelling advice, with -ice at the end, is the standard English spelling for the noun, but never for the verb. Advice has two meanings:

• guidance or recommendations offered to someone about the best course of action to take in a particular situation: she gave good advice about treating everyone with respect; her help surprised him, but he took her advice.

• (in business and legal use) a formal record of a financial agreement or other transaction: cheques and remittance advices were raised in alphabetical order.

• Advice is mainly used with the first meaning, and in this meaning it is a mass noun (that is, it has no plural).

• The business/legal meaning, however, is a count noun: it has a plural form, advices.

  • Tip 1: there are just two possible forms for the noun: advice and advices.

  • Tip 2: when you pronounce advice, the ending rhymes with ice.

Solution 2:

"Some advices" is archaic, having passed out of use about 100 years ago. See Ngram.

Likely it is true that this usage still persists in India, as parts of the English language as used there were "frozen" about that long ago.

It is not, however, considered to be modern, idiomatic usage in the US or, to my knowledge, in the British Isles, and its use would generally cause a reader to suspect that the author was not a "native English speaker".