RSIM Card Tray to Normal Sim Card Tray Switch

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Level 1

8 points

RSIM Card Tray to Normal Sim Card Tray Switch

I've Recently bought an iPhone 5s (used) which is japan locked and uses a particular type of sim card called the RSIM and from where I'm from (Philippines) we don't use RSIM just regular nano sims and whatever.

Recently I have seen the effect of putting a normal nano sim card into an RSIM Card Tray.

1 important thing that affected the performance of my phone I have to assume it was because of the RSIM is with the messaging app.

My contacts can send me text messages but when I wanna reply to them it just doesn't send. The thing is it was this only particular thing that was affected.

The Phone app works (I can call any of my contacts and I too receive calls from them)

My Mobile Data works fine (My mobile dating used for surfing on apps like facebook or Instagram still works fine)

The only problem really is me not being able to send a text back or even send texts in general

And I'm just wondering if changing the RSIM Card Tray to a Normal Sim Card Tray would help solve that problem?

Thank you in advance to anyone who can solve this issue for me.

iPhone 5s, iOS 10.3.1

Posted on Apr 10, 2017 10:20 AM

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Answer 1

KiltedTim

Level 10

224,250 points

Apr 10, 2017 10:35 AM in response to timdeleon08

The RSIM is an illegal hardware hack.

ONLY the carrier the phone is locked to can authorize unlocking it. Contact the carrier it's locked to. If they refuse to unlock it, you will not be able to use the phone on a network other than the one it is locked to.

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Answer 2

Apr 10, 2017 10:50 AM in response to timdeleon08

An RSIM is an illegal hack to try and get around a carrier lock. So your Japanese iPhone is carrier locked to some Japanese carrier and will not accept any other SIM card. You would need to get the carrier that owns the SIM lock to authorize an unlocking, which I believe most carriers in Japan do not offer.

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Answer 3

timdeleon08 Author

Level 1

8 points

Apr 10, 2017 8:34 PM in response to Michael Black

Thanks for the reply but one thing about this when i bought it from another guy is... He told me that the phone was japanese locked but unlocked via globe postpaid (Filipino Carrier) and i'm just wondering if like changing out the sim card trays would work...

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Answer 4

KiltedTim

Level 10

224,250 points

Apr 11, 2017 4:01 AM in response to timdeleon08

Not possible. ONLY the carrier it is locked to can authorize unlocking it. No one else. Your local carrier can not unlock it. They can attempt to hack or jailbreak the phone to illegally unlock it, cut they can't legitimately do so.

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Answer 5

Apr 11, 2017 5:59 AM in response to timdeleon08

The only carrier that can permanently unlock an iPhone is the carrier it is locked to. No other carrier can permanently unlock another carrier's locked devices. What he or someone else did was use the RSIM hack to make it work on the Filipino carrier - it is not carrier unlocked and will not accept another SIM.

If it was truly carrier unlocked, there would be no point in ever bothering with an illegal RSIM hack in the first place.

RSIM chips or cards are called interposer chips, and they make illegal use of national emergency call numbers to bypass carrier locks on devices. Since that is an illegal use of national emergency numbers in most countries, these SIM hardware hacks are illegal in most countries.

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Answer 6

timdeleon08 Author

Level 1

8 points

Apr 10, 2017 8:36 PM in response to KiltedTim

If it is japan locked and it was unlocked through a local carrier here in the philippines would that even work though?

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