Because of its very thin and slim design it fits into almost all phones on the market and can also be easily removed again. Its got Gold Immersion and makes perfect contact with the card and the socket at ALL times.

Cutting of your Operators SIM card is required but kept to a minimum. (there are products on the market claiming that no cutting is required to use them, however they dont give a reliable connection between the phone and the Sim card so that in certain cases it might not work at all or you might get problems during usage)

X-SIM is a revolutionary do-it-yourself Plug and Play card for unlocking Sim Cards without unlocking the Mobile Phone so the risk of damaging the phone while attempting to unlock it is void and it’s warranty safe.

X-SIM is inserted into the mobile phone in parallel with your Operator’s SIM card and enables you to use your card on phones locked to another provider.

No more cracks and illegal hackings.
No more damaged phones.
No more lost warranty because of phone modifications.

Technical Details:

Does not do any changes to your SIM card or phone (you only have to make a cut in the SIM card) Does not influence any communication between the phone and the network and vice versa Real time on the fly communication modifications, does not reroute SIM card traffic (Its transparent to the phone) Work with 1.8V, 3V and 5V SIM cards Works with normal and inverted protocol SIM cards Its slim enough to fit together with your SIM card into most phones SIM socket.

Compatibility List:

Apple: iPhone
BenQ Siemens: C81, CF61, CL71, EF51, EF61, EF81, EF91, EL71, P51, S68, S88
BlackBerry: 7100t, 7100v, 7100x, 7130v, 7290, 8100 Pearl, 8700f, 8700g, 8707v, 8800 Pearl, 8820
Dell: Axim 51
E-TEN: G500, M600
HP: hw6500, hw6900, hx2700, hx4700, rw6815, rx5915
HTC: Advantage, MTeoR, P3300, P3400, P3600, P4350, P6300, S310, S620, S710, Touch, TyTN
i-mate: JAM, JAMin, JASJAM, JASJAR, K-JAM, PDA2, PDA2K, Smartflip, SP JAS, SP3, SP3i, SP5, SP5m, SPL
LG: F2400, KE800 Chocolate Platinum, KE850 Prada, KE970 Shine, KG290, KG320, KG800 Chocolate, KG810, KG920, L343i, P7200, S5200, U300, U400, U8210, U8290, U8360, U8380, U880, U890
Lobster: 700TV
Mio: A701
Motorola: A1000, A780, A830, A835, A910, A925, C390, E1000, E1070, E398, E550, E770v, KRZR K1, L2, L6, MPx, MPx220, PEBL U6, Q, RAZR maxx, RAZR V3, RAZR V3xx, RAZR2 V8, RAZR2 V9, RIZR, RIZR Z6, RIZR Z8, ROKR E1, SLVR L7, T280i, V360, V3i, V3x, V500, V525, V545, V547, V550, V600, V620, V635, V80
NEC: 411i, e540, e616
Nokia: 2630, 2760, 3109 Classic, 3110 Classic, 3230, 3250, 3500 Classic, 3650, 3660, 5200, 5300, 5500, 5700, 6021, 6085, 6086, 6103, 6110 Navigator, 6111, 6120 Classic, 6125, 6131, 6151, 6230, 6230i, 6233, 6234, 6260, 6267, 6270, 6280, 6288, 6290, 6300, 6310i, 6500 Classic, 6500 Slide, 6600, 6630, 6650, 6670, 6680, 6681, 6810, 6820, 6822, 7280, 7370, 7373, 7380, 7390, 7600, 7610, 7700, 7710, 8600 Luna, 8800, 8800 Sirocco, 8910, 8910i, 9300, 9300i, 9500, E50, E60, E61, E61i, E65, E70, E90, N-Gage, N-Gage QD, N70, N71, N72, N73, N76, N80, N90, N91, N92, N93, N93i, N95
O2: Cocoon, Ice, Jet, X1b, XDA Argon, XDA Exec, XDA Graphite, XDA II, XDA IIi, XDA IIs, XDA IQ, XDA Mini S, XDA Orbit, XDA SP, XDA Stealth, XDA Trion, XDA Zinc
Orange: C550, M1000, M1500, M2000, M3000, M3100, M500, M5000, M700, SPV C100, SPV C500, SPV C600, SPV C700, SPV E200, SPV E650, SPV M600
Palm: LifeDrive, Treo 650, Treo 680, Treo 700, Treo 750
Panasonic: VS6, X70, X700
Qtek: 2020i, 8010, 8100, 8300, 8310, 8500, 8600, 9000, 9090, 9100, 9600, S100, S110, S200
Sagem: my301X, my302X, my401x, my501c, my501x, my600v, myV76, myX-8, myX6-2
Samsung: D520, D600, D800, D820, D830, D840, D900, D900i, E250, E370, E390, E530, E570, E590, E620, E720, E730, E740, E760, E770, E780, E840, E870, E880, E900, F200, F210, F300, G600, i300, i300x, i320, i600, J600i, L760, P200, P260, P300, P310, S400i, S500i, Serene, SGH U300, SGH X700, SGH Z500, U100, U600, U700, X680, X820, X830, Z130, Z140, Z300, Z320i, Z400, Z510, Z540, Z560, Z650i, Z720, ZM60, ZV40
Sanyo: S750, S750i
Sendo: X
Sharp: 703, 770SH, 802, 902, 903, GX15, GX17, GX25, GX29, GX30, GX30i
Siemens: CX75, M75, S55, S65, S75, SK65, SL75, SP65, SX1
Sony Ericsson: D750i, K510i, K530i, K550i, K600i, K608i, K610i, K700i, K750i, K790i, K800i, K810i, K850i, M600i, P1i, P800, P900, P910i, P990i, S700i, SE S500i, T610, T630, T650i, T68, T68i, V600i, V630, V800, W300i, W550i, W580i, W610i, W660i, W700i, W710i, W800i, W810i, W850i, W880i, W900i, W950i, W960i, Z1010, Z310i, Z520i, Z530i, Z550i, Z558i, Z600, Z610i, Z710i, Z800i
T-Mobile: Ameo, MDA Compact, MDA Compact II, MDA Compact III, MDA III, MDA Mail, MDA Pro, MDA Touch, MDA Vario, MDA Vario II, SDA, SDA II, SDA Music, Sidekick III
Toshiba: TS803
VK: 2020
Vodafone: v1415, v1605, v1640, VPA Compact

And Many More…