Pero tengo 3 celulares y los tres funcionando prefectamente con señal a full
Aqui un identify

ChipID:9900,EMP protocol:0301
PHONE IS RED RETAIL PRODUCT
FLASH CID detected:52
Speed:921600
Flash ID check:2019
Flash props sent ok
OTP LOCKED:1 CID:51 PAF:1 IMEI:35273302603925 CERT:RED
FLASH CID:52 COLOR:RED

Model:K550i
Brand:TELCEL GSM
MAPP CXC article: R8BA024 prgCXC1250669_GENERIC_LI
MAPP CXC version: R8BA024
Language Package:AMERICA_2
CDA article: CDA102743/144
CDA version: R1A
Default article: cxc1250671
Default version: R8BA024

Network LOCKED
Operator: 334-02

Elapsed:5 secs.