Dual SIM Card Adapter for iPhone 4 / 4S - Random Color

Pros: Apparent simple design. Good price point.

Cons: Ribbon cable is easily cut by iPhone SIM card tray due to the tight fit of the micro SIM on the iPhone 4. Having to completely bend the ribbon cable over the SIM in order to fit it is retarded.

Other: Great concept spoiled by a poor design. Overall I am not too dissapointed due to the price of the adapter. If I had paid $15 or more for it and it broke straight away I would have been really annoyed.

Pros: It works with 3G. Secondary SIM that fits on the back of the iPhone is the most commonly use mini-SIM size so no need to cut to micro-SIM. Very easy to change SIMs by going into Settings, Phone. Has auto timer feature where phone will activate SIM1 for X minutes then change to SIM2 for Y minutes (you choose values for X and Y ranging from 1-99 min).

Cons: No instructions provided so you must be a little familiar with how these devices work. Tricky to fit into SIM tray but once you figure it out it's no problem. I think that's why previous reviewer's broke.

Other: Buy it for when you travel to another country and use a pre-paid SIM card there to save you lots of $$$.

Pros: Works with my iPhone 4 using 2 Telia sims (Swedish provider). No special case needed if using a case with a soft or semi-soft back.

Cons: No instructions. Cable will easily be damaged if not careful. Metal frame is quite thick and sharp. VERY difficult to make it work without the metal frame (needs pressure on the SIM).

Other: Works great once installed and held in place by a case.

Pros: Cheap, works fine with my iPhone 4 IOS4.2.1
Thin and fits in my Belkin case (slight bump though)
Puts a SIM Application menu in the iPhone making it simple to switch SIMs

Cons: No Manual.
Took me a couple of tries to make it work
The metal holder for the outside SIM was slightly bent when it arrived and because of it the SIM was not detected.
Some of the menus doesn't seem to work (but it probably is because of the iPhone not supporting the feature)

Other: nice toy, but it would be better if they can make this active at the same time. There is a SIM option that allows this, but it doesn't work in my iphone... I think you need a phone that supports 2 SIMs to do this.

Pros: the pros of this item are it is small and light weight. it supposts both the micro sim and the original sim.

Cons: the cons of this item is it is cheeply made and in order to make it fit in the sim card tray you have to force it in there. and its really hard to get the sim card back out.

Other: if you have the knowledge and experience with the phones and what not... this item is perfect for you.

Pros: It works with 3G. Secondary SIM that fits on the back of the iPhone is the most commonly use mini-SIM size so no need to cut to micro-SIM. Very easy to change SIMs by going into Settings, Phone. great for those who carry two numbers on two sim card.

Cons: Ribbon cable is easily cut by iPhone SIM card tray due to the tight fit of the micro SIM on the iPhone 4. Having to completely...

Other: nothing to add except that it still is the best adapter to have for iphone owners who needs it.

Pros: English: It works with the Galaxy S3 on 3G networks. No need to restart the phone. In the Galaxy S3 and possibly close the back cover with him in not being necessary to buy another cover. Português: Ele funciona com o Galaxy S3 nas redes 3G. Não precisa reiniciar o celular. No galaxy S3 e possivel fechar a tampa de trás com ele dentro não sendo necessario comprar outra capa.

Cons: English: Presents no instruction manual. Chip features two patterns of a microchip and other standard simcard. High cost. Português: Não apresenta manual de instrução. Apresenta dois padroes de chip um microchip e outro simcard padrão. Alto custo.

Other: English: Cool toy only works one chip at a time. Português: Brinquedo legal só funciona um chip por vez.

Pros: Easy to use, works perfectly with my samsung galaxy s3 i9300 internatinal and galaxy note 2 N7100 interntional. No reboot is required, as required by QSIM product. You can rename the SIM. Switching time is fast.

Cons: Built quality is not so good, torn easily if not handle properly. IC height is more. This product IC cannot grind down to low level, I try 2 times and fails. And two of my product got damged. Also the lack of 007 menu. So only three major problems 1. Build flex pcb quality 2. IC Height 3. 007 menu Besides of these the adapter works well and have no problem, working perfectly for last 1 months

Other: Build quality, If not use with care the flex pcb brokes

Pros: You really can use two sim cards in your iphone 4s, but second SIM card must be "full size" - inner card - microsim. Secind - standart sim

Cons: First start - I got 3G on first sim. but after switch to sim-2, and get back - I could not get any 3G, only EDGE. I don't know - problem of this device, or problem my Ukraine cell operator TriMob (Utel). But on second switch TriMob switch to roaming (local) to other - non-3G operator. For me - it's useless ;(

Other: Good for normal operator, but if some problem with 3G - useless

Pros: I'm using it on a Samsung Galaxy Note II and it works. It takes a bit of experimentation to find the sweet spot where it can be squeezed between the battery and the back cover. Works: voice calls, messaging, video calls, HSPA internet, others might also be working but I've not been able to play with it too long. Build quality os ok for the price.

Cons: Build quality is also a con as it looks very easy to damage. Changing sim will involve a downtime of about 10 seconds in which there will is no network connection. Using the auto switch feature, there was an instance when the sim changed while I was dialing and making a call. There is no documentation on the features...I can't tell for instance if the time for autoswitch is in minutes or seconds. Also there is an Iphone4S toggle switch that I can't tell the purpose for. It would also be great if qe can customize the name of the SIM instead of the generic SIM1 and SIM2.

Other: Bottomline I am fairly happy with this purchase as I wasn't expecting too much. I would buy another one if the need came up.