[Upgrading, Modifying and Unlocking] SickAttack:
Hello guys,

I have a problem with my phone. I cannot install the correct firmware, I can only install the firmware (Orange Hi 4G) but it's not compatible with my phone, so the phone bootloops and doesn't go into the system.

I cannot install the firmware for my device because it's not signed with the orange's certificate and key, my phone has the orange's recovery and fastboot is disabled on the rom so I cannot use that. I have the certificate and key but I cannot get the key in a .pem file, the certificate is already in one.

Phone: ZTE Blade Apex 2

Recovery in Phone: Orange recovery

Recovery: Stock recovery

Certificate:

MIIErjCCA5agAwIBAgIJAOuCYND5gmZOMA0GCSqGSIb3DQEBBQUAMIGWMQswCQYD

VQQGEwJDTjERMA8GA1UECBMIU2hhbmdoYWkxETAPBgNVBAcTCFNoYW5naGFpMQww

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SzZSJvCx4hFKKq6m9CHg60vhlVQ4gLkuKb1l+pFbJdrP8yL1YKQqSrWWDAhPcuIl

Lj3UcmzfbMRQhM4mrXf49ees2xyVZO38KjtSSBw/ygvH5PSrX6KFUqQdxVeciLga

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MIH7MB0GA1UdDgQWBBS6NVREsJ5wGdTi/26mEwf8h2KDfzCBywYDVR0jBIHDMIHA

gBS6NVREsJ5wGdTi/26mEwf8h2KDf6GBnKSBmTCBljELMAkGA1UEBhMCQ04xETAP

BgNVBAgTCFNoYW5naGFpMREwDwYDVQQHEwhTaGFuZ2hhaTEMMAoGA1UEChMDWlRF

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gUTLJoytol5SHPksdhbMjTOTEsaPiOVQZ0sHk9JDPoXRJlZvLXIvZCtzG+YCjpF8

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hPH9+NppDljxd19T1cEzkFERFEI8dWkTCaE8mRNQfShSt7N3vW+kfELq8rlkvDMW

9JM=

Key:

AAAAAQAAABSR52UCnjiSFiwLKyzthZxY4sJ0ZQAABdEBAAh2ZXJpc2lnbgAAASw2

S2EsAAAAAAAFWC41MDkAAAMGMIIDAjCCAmsCEH3Z/gfPqB63EHln+6eJNMYwDQYJ

KoZIhvcNAQEFBQAwgcExCzAJBgNVBAYTAlVTMRcwFQYDVQQKEw5WZXJpU2lnbiwg

SW5jLjE8MDoGA1UECxMzQ2xhc3MgMyBQdWJsaWMgUHJpbWFyeSBDZXJ0aWZpY2F0

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BrO6WVcmeQD2+A2iMzAo1KpYoJ2daZH9AQAKb3JhbmdlX3R0ZwAAASw2S6sfAAAA

AAAFWC41MDkAAAOaMIIDljCCAv+gAwIBAgIJAOzGENAox4zdMA0GCSqGSIb3DQEB

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I don't know what to do anymore. I tried to get the certificate and key.pk8 to sign the other firmware but no luck. If anyone could help me I would appreciate it. Thank you in advance!