Root [Verizon] Tmobile sim in a Verizon Galaxy s3 4.3

[IzikLloyd]

I recently purchased a galaxy s3 off of Craig's list and was intending on using it with my tmobile sim, I popped the sim in the galaxy switched it over to gsm and selected T-Mobile and it jus said "registering with tmobile" then after a bit it would say "failed to establish a connection" please any help would be great, I've been searching forums for hours on end looking for a answer, anyone have any insight? Thanks in advance!! Oh and btw the s3 is currently rooted

 

[Rukbat]

The Verizon S3 is a CDMA phone. It can't establish a (2G) connection with a GSM carrier, so you can't do what you're trying to do.

 

[IzikLloyd]

i understand what you are saying but i just recently got connection to tmobile via global services but within a few minutes went away :/ im am extremely confuzzled

 

[IzikLloyd]

heres the screen shot i captured before i got the error message "the selected network (t-mobile) is not available" i was even able to send a quick text before i got cut off

 

[sreum]

I recently purchased a galaxy s3 off of Craig's list and was intending on using it with my tmobile sim, I popped the sim in the galaxy switched it over to gsm and selected T-Mobile and it jus said "registering with tmobile" then after a bit it would say "failed to establish a connection" please any help would be great, I've been searching forums for hours on end looking for a answer, anyone have any insight? Thanks in advance!! Oh and btw the s3 is currently rooted

Is it a CDMA or GSM phone? Need more info about this phone you purchased. Cause the phone just being rooted and having GSM capability may establish connection for a moment but will lose it in the long run.

 

[IzikLloyd]

it is a CDMA phone with GSM and Global capabilities, but the GSM bands between verizon and T-Mobile i heard are very different, so would there be a way i could possibly flash it to enable adequate GSM connection for my T-Mobile sim?

 

[BRAINZ2013]

You can but u will may need to root to edit the prop file . or you can get the gsm patch and flash via clockworkmod or twrp

 

[Mikestony]

it is a CDMA phone with GSM and Global capabilities, but the GSM bands between verizon and T-Mobile i heard are very different, so would there be a way i could possibly flash it to enable adequate GSM connection for my T-Mobile sim?

Just following along here, and I would tend to agree based on this:
Verizon Samsung SCH-i535 Galaxy S3 Detailed Specs | Technical Datasheet | PDAdb.net
Take a look at this posted there:

Cellular Phone
Cellular Networks: GSM850, GSM900, GSM1800, GSM1900, UMTS2100 (B1)
Cellular Data Links: GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+
Cellular Antenna: Internal antenna
Call Alert: 64 -chord melody (polyphonic)
Vibrating Alert: Supported
Speakerphone : Supported
Phone Controller: Qualcomm MSM8960

Secondary Cellular Phone
Dual Cellular Network Operation: Dual standby
Secondary Cellular Networks: CDMA800 (BC0), CDMA1900 (BC14), LTE700 (B13)
Secondary Cellular Data Links: cdmaOne, CDMA2000 1xRTT, CDMA2000 1xEV-DO Rel. 0, CDMA2000 1xEV-DO Rev A, LTE
Secondary Cellular Antenna: Internal antenna
Secondary Phone Controller: Qualcomm MSM8960

 

[IzikLloyd]

And where would I find a GSM patch for the sch-i535?

 

[redjama]

If you manage to get this working let me know cause Im trying to do the same exact thing

 

[IzikLloyd]

If you manage to get this working let me know cause Im trying to do the same exact thing

Will do man, this has been a long confusing process Dx

 

[redjama]

Im not trying to buy another phone. I have the phone for sale right now on Swappa, if it sells im just gonna buy a T-Mobile version, if not would like to make this one work!!

 

[TALONTRAX]

Try this . . .

[Q] sch-i535 on t-mobile - xda-developers

on my rom, (CleanRom 6r2 4.1.2)this works. I never changed any of the settings. After a reboot with the Tmobile sim, it will search for 4g service & should connect. Data will be edge only as far as I know. Also if you haven`t already, you will have to change your apn settings to get sms & data. In network settings, mine also works on CDMA or global for verizon. I often contemplated getting a Tmobile sim to test this after changing the network control/band settings in the field test menu . . . but never did . . .

 

[TALONTRAX]

here are some screenshots of the UTMS menu