Got my U mobile sim today! (problem?)

Yehey!

Got my U-mobile sim today!



...with 100 pesos free load for the next 6 months!!!!!!!

I noticed a few things though...
1. I cannot send text messages to globe telecom subscribers
2. I cannot send text messages to sun cellular subscribers
3. My number doesn't appear on other networks caller ID. (" Withheld " appears instead of my number)
4. what else... I noticed all that after 5 minutes of opening my sim package.

No complaints yet though. Still happy to receive a U-mobile sim.

*sending SMS/ Text messages to smart network is fine.