Hi everyone,

I would like to seek for help/advise on my U mobile Prepaid Plan.

1. On 2nd Apr 2017, I travel from Malaysia back to Singapore and my prepaid plan became totally no coverage instead of switch into roaming mode.
2. My account is active and I still have plenty credit balance in it.
3. on 22nd Apr 2017, I felt frustrated and I plan to visit umobile store to replace the sim card (I thought was sim card faulty), but right on the time I reached JB custom, the Sim card and coverage became back online and usable. On the same day when I travelled back to Singapore, It did switch to roaming status.
4. Currently, 23rd Apr 2017, the sim card status became No Line and services at all again.

Does anyone facing the similar problem or it's just me.
can someone advise and help on this.Thank you

Thanks for your kind assist.

My phone supports LTE and I didn't enable data roaming when oversea. Just let it remain under Starhub roaming coverage to receive OTP for bank transaction.

I wonder is it my sim card's problem because i have this sim card probably since 2012. Previously the LTE services for my sim card, I follow umobile instruction by SMS to activate but didnt physically change the sim card.

1st of thanks DgBoy for your kind assist.

But I can't solve the problem as:

1) my phone can only switch among
i) 2G /3G/4G (automatic) - (which i choose this)
ii) 2G / 3G
iii) 2G

2) I tried to swap the U mobile sim card to primary slot but it doesn't respond as well.

3) I tried to search network manually but end up it shows no network

4) is it necessary to enable Data roaming to have the normal roaming services to receive incoming sms from malaysia?

I'm using One Plus 2 and throughout these years it was working well until recently early of Apr 2017.

thanks dgboy for your advice.

Unfortunately, I encountered some situation also:

1) by switching mobile data to Umobile instead of Singapore sim card and enable data roaming features.
2) the signal bar manage to appear again with R icon.
3) in this situation, does it mean I can't use my Singapore sim card data plan?
4) But the most disappointing is , with full bar of signal, typing *118# to try to check and it show "Connection problem or invalid MMI code"
5) I try to make IDD call from SG into this number but unable to reach (not even into voice mail)

thanks for the suggestion. Anyway after changing the usim to primary slot, the problem still exist, I believe is the hardware problem with the version of the sim card probably. No choice but to arrange sim card replacement.