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Using international SIM cards

Hi All,
Please excuse me if this is a dumb question. I am moving over from Sprint to Verizon and travel to India a lot. I know and believe I will have no problem roaming over in India on CDMA, as I do so often on Sprint and Verizon's website shows CDMA coverage as well. What I would like to know and double check myself on is being able to switch SIM cards. I understand the GS3 on Verizon has a SIM card in it... is it possible to pickup a local sim card in India and put it in my phone to use local service?
From my understanding at the moment, if I want to do this, I need to follow this thread and steps...
http://forum.xda-developers.com/showthread.php?t=1809314
Is it possible to have Verizon give me an unlock code to be able to use a different local SIM in India? Any help would be grateful.
-Grand

[Q] Traveling to Brazil....

All,
Traveling to Brazil in November. I have a stock Verizon GS3. Can this phone do roaming on the Verizon SIM or if not, can I plug a local SIM on this phone?
Thanks all for your input!
-Nutzer

[Q] My LG Optimus G E971 region locked??

This is really wierd. Hope someone can help.
I bought an unlocked LG Optimus G E971 phone in Toronto, Canada this May. Inserting a Rogers and Fido SIM card was perfectly fine and working while I was in Toronto Canada. No SIM network unlock PIN required.
In October, I travelled on vacation to Hong Kong with the same phone that I thought was unlocked. As always, I would buy a local SIM for my unlocked phone. To my surprised, it prompted for a SIM network unlock PIN. I went to a total of 3 carriers, including 3 Telecom, China Mobile and one other (cannot remember the name). All asked for a SIM unlock PIN.
Not believing what had happened, I went back to the shop in Toronto, Canada after returning home. Tried inserting Rogers, Fido, Bell and AT & T SIM card, all worked perfectly.
My question is, could this be a region lock? Like the Samsung Galaxy Note 3?
Anyone has similar experience to share?

chopstks said:
This is really wierd. Hope someone can help.
I bought an unlocked LG Optimus G E971 phone in Toronto, Canada this May. Inserting a Rogers and Fido SIM card was perfectly fine and working while I was in Toronto Canada. No SIM network unlock PIN required.
In October, I travelled on vacation to Hong Kong with the same phone that I thought was unlocked. As always, I would buy a local SIM for my unlocked phone. To my surprised, it prompted for a SIM network unlock PIN. I went to a total of 3 carriers, including 3 Telecom, China Mobile and one other (cannot remember the name). All asked for a SIM unlock PIN.
Not believing what had happened, I went back to the shop in Toronto, Canada after returning home. Tried inserting Rogers, Fido, Bell and AT & T SIM card, all worked perfectly.
My question is, could this be a region lock? Like the Samsung Galaxy Note 3?
Anyone has similar experience to share?
Click to expand...
Click to collapse
Probably.
Region locking or maybe that your phone did not have the right baseband? I dont know. My phone had a similar problem, it displayed roaming in the native country I was.
If you find something about it, please do post back, ok. I am very curious to this issue.

You need to unlock the phone from your carrier in order to user unlocked sim on your mobile

naveenii1991 said:
You need to unlock the phone from your carrier in order to user unlocked sim on your mobile
Click to expand...
Click to collapse
I can use both Fido/Rogers and Bell. They are different carriers and Fido and Bell are competitors in Canada. My LG Optimus G E971 is manufacture unlocked meaning its brand new and unlocked when I bought it from the shop. I don't buy locked phones from carriers and I don't need an unlock code. Been buying and using manufacture unlocked GSM phones in the past 10 years, never had an issue. Not a believer of locked phones and it's ripped off plans in North America.

shadowcore said:
Probably.
Region locking or maybe that your phone did not have the right baseband? I dont know. My phone had a similar problem, it displayed roaming in the native country I was.
If you find something about it, please do post back, ok. I am very curious to this issue.
Click to expand...
Click to collapse
The LG Optimus G E971 is quad band and it has HSDPA 850/1900/2100. I matched this to my Samsung Omnia II (I8000) which has HSDPA 900/1900/2100. My Omnia II is manufacture unlocked and is usable in Hong Kong (Asia) without an issue. Not a phone tech person but I would assume my LG Otpimus G E971 is quad band and is useable in Hong Kong.
I didn't know there was a section for LG Otpimus G, I have also posted my replies here:
http://forum.xda-developers.com/showthread.php?t=2498109

Need sim unlock code for S6 from UK which will be used with USA simcard

Hi,
I have my dad's phone which is S6 with Vodafone UK. He needs to use here in USA. but, after sim is inserted, the phone states enter Sim unlock code....... it seems it is sim locked to Vodafone. My dad bought this phone from local market shop and did not knew it will be locked to vodafone simcard only.
Can someone help.

Hello anyone know how to disable the service provider update when swapping SIM cards ?

Hi All,
the reason i'm asking is because i'm using an unlocked samsung note 20, if i put in the tmobile sim, i get 5g , but somehow if i put in the prepaid sim it shows the service provider update and will not have 5g after restart, if i use the tmobile it will have the 5g. is there a way to disable the service provider update? thanks.