iPhone 7 no sim after nand change - GSM-Forum

haddar · 07-08-2018, 20:19

hi all,
i had to replace a NAND on iPhone 7 32G, and on my way, i wanted to increase capacity from 32 to 128G as i had a 128G nand laying down in my stock, along with its home button. I though it would be a great idea if i do it, and fix the home button issue, as it was not working.
After restore, the phone is not recognizing any sim card
do you happen to have an idea on this issue ?
I am afraid the BaseBand CPU solder is damaged as it is on the opposite side

thank you all

haddar · 10-14-2018, 11:26

guys, i still can't figure out whats wrong with the sim card. I checked the solder of the sim socket, and all components around the NAND but i don't see any visible issue
Any help is much appreciated
thanks

vcka · 10-14-2018, 18:01

You cant use nand from another phone without programing it. And home key from another phone wont work either.

haddar · 11-25-2018, 10:43

i copied the original SN/WIFI/BT MAC from the original NAND of course but it doesn't seem to work that way. it used to work on iPhone 6
Ok, let's forget about the Touch ID, do you know what might be wrong with the SIM ?

ninos22 · 11-25-2018, 14:24

What about IMEI and FW modem? It's ok?

christina_ · 12-02-2018, 07:15

If no imie on your phone or baseband firmware, means you heat up TOO MUCH AND now phone is done, good luck

Tony2323 · 12-02-2018, 16:01

Rebal baseband chip.........

topcomgsm · 12-03-2018, 04:11

No sim card or searching and no imei in *#06#, if no sim card check diode zenner, if this is broken, remove it

CloudCukooLand · 12-04-2018, 11:26

Didn't they change it in iOS 11 so that serial number had to match? Doesn't the SN have to change with the NAND size - I thought this meant you can't change NAND size anymore...

CDMA_RASHID · 01-22-2019, 15:38

Just Remove DZ6900_RF.

Tony2323 · 01-28-2019, 15:22

check R6904_RF I think you removed it spoke with nand

07-08-2018, 20:19	#1 (permalink)
haddar Freak Poster Join Date: Jan 2004 Posts: 263 Member: 48755 Status: Offline Thanks Meter: 30	iPhone 7 no sim after nand change hi all, i had to replace a NAND on iPhone 7 32G, and on my way, i wanted to increase capacity from 32 to 128G as i had a 128G nand laying down in my stock, along with its home button. I though it would be a great idea if i do it, and fix the home button issue, as it was not working. After restore, the phone is not recognizing any sim card do you happen to have an idea on this issue ? I am afraid the BaseBand CPU solder is damaged as it is on the opposite side thank you all Last edited by haddar; 07-08-2018 at 20:20. Reason: typo in title

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10-14-2018, 11:26	#2 (permalink)
haddar Freak Poster Join Date: Jan 2004 Posts: 263 Member: 48755 Status: Offline Thanks Meter: 30	guys, i still can't figure out whats wrong with the sim card. I checked the solder of the sim socket, and all components around the NAND but i don't see any visible issue Any help is much appreciated thanks

10-14-2018, 18:01	#3 (permalink)
vcka Junior Member Join Date: Jul 2005 Posts: 18 Member: 164599 Status: Offline Thanks Meter: 2	You cant use nand from another phone without programing it. And home key from another phone wont work either.

11-25-2018, 10:43	#4 (permalink)
haddar Freak Poster Join Date: Jan 2004 Posts: 263 Member: 48755 Status: Offline Thanks Meter: 30	i copied the original SN/WIFI/BT MAC from the original NAND of course but it doesn't seem to work that way. it used to work on iPhone 6 Ok, let's forget about the Touch ID, do you know what might be wrong with the SIM ?

11-25-2018, 14:24	#5 (permalink)
ninos22 Freak Poster Join Date: Mar 2013 Location: Greece Age: 35 Posts: 425 Member: 1903358 Status: Offline Thanks Meter: 146	What about IMEI and FW modem? It's ok?

12-02-2018, 07:15	#6 (permalink)
christina_ Freak Poster Join Date: Jan 2010 Location: Canada Posts: 340 Member: 1211915 Status: Offline Sonork: 345634564 Thanks Meter: 93	If no imie on your phone or baseband firmware, means you heat up TOO MUCH AND now phone is done, good luck

12-02-2018, 16:01	#7 (permalink)
Tony2323 Freak Poster Join Date: Sep 2010 Location: ČR Posts: 132 Member: 1388158 Status: Offline Thanks Meter: 30	Rebal baseband chip.........

12-03-2018, 04:11	#8 (permalink)
topcomgsm Freak Poster Join Date: Sep 2006 Location: topcom.comunicaciones Age: 47 Posts: 152 Member: 353737 Status: Offline Sonork: 100.1580139 Thanks Meter: 43	No sim card or searching and no imei in *#06#, if no sim card check diode zenner, if this is broken, remove it

12-04-2018, 11:26	#9 (permalink)
CloudCukooLand Junior Member Join Date: Nov 2011 Location: Scotland Posts: 35 Member: 1686281 Status: Offline Thanks Meter: 3	Didn't they change it in iOS 11 so that serial number had to match? Doesn't the SN have to change with the NAND size - I thought this meant you can't change NAND size anymore...

01-22-2019, 15:38	#10 (permalink)
CDMA_RASHID No Life Poster Join Date: Jul 2008 Location: Mumbai Age: 36 Posts: 1,023 Member: 821646 Status: Offline Thanks Meter: 507	Just Remove DZ6900_RF.

01-28-2019, 15:22	#11 (permalink)
Tony2323 Freak Poster Join Date: Sep 2010 Location: ČR Posts: 132 Member: 1388158 Status: Offline Thanks Meter: 30	check R6904_RF I think you removed it spoke with nand