Yes, you can. For example, if you combine Daily Combo Pack and Umrah & Hajj Pack, the following will happen:
- When you start a valid roaming usage (whether voice or data), it is consumed first from the Umrah & Hajj Pack
- Once data is fully-consumed (but pack is still valid with voice allowances), succeeding data usage will activate the Daily Combo Pack
- When you make valid outgoing calls or receive incoming calls, it will consume from the Umrah & Hajj Pack