if u use <700mb per month, then maybe

cos 2gb for rm48 can last 3 months

so rm16 for about 700 mb

like carry forward, use less this month next month get more

no need to active oso can surf

so if expire today, buy internet 2gb can use another 3 month for surfing only

but after finish got ppu

iinm cannot make call/sms, but still can surf net

same like umobile tho

There are two types of validity

Account validity and credit validity

Credit validity allows you to make calls and SMS

This is better known as top up validity

Account validity refers to how long your SIM card can last before expire

So if you top up rm 10 but buy 1gb data, you can only make calls for 20 days but you can online for 3 months

PPU is actually good got those who use internet less frequent

Altel ppu is quite decent, just few cents/mb

But celcom and digi beware, eat rm10/rm8 in an instant